Test Bank Chapter.4 The Major Classes Of Chemical Reactions

Chapter 4 Test Bank

Three Major Classes of Chemical Reactions

1. A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

A. 41.3 g

B. 31.9 g

C. 16.1 g

D. 8.77 g

E. 2.41 gAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

2. Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO₃ ( = 106.45 g/mol).

A. 419 g

B. 169 g

C. 0.419 g

D. 0.169 g

E. 0.00394 g

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

3. Lithium hydroxide is used in alkaline batteries. Calculate the molarity of a solution prepared by dissolving 1.495 moles of LiOH in enough water to give a final volume of 750. mL.

A. 1.99 M

B. 1.50 M

C. 1.12 M

D. 0.502 M

E. 0.00199 MAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

4. Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

A. 28.5 mol

B. 1.04 mol

C. 0.139 mol

D. 0.0285 mol

E. 0.00721 molAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

5. Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH

solution.

A. 2.543 mol

B. 1.383 mol

C. 0.7232 mol

D. 0.3932 mol

E. 0.001383 molAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

6. Calculate the molarity of a 23.55-mL solution which contains 28.24 mg of sodium sulfate (used in dyeing and printing textiles, = 139.04 g/mol).

A. 8.625 M

B. 1.199 M

C. 0.8339 M

D. 0.2031 M

E. 0.008625 M

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

7. When 2.61 g of solid Na₂CO₃ is dissolved in sufficient water to make 250. mL of solution, the concentration of Na₂CO₃ is:

A. 0.0246 M

B. 10.4 M

C. 0.205 M

D. 0.0985 M

E. 0.141 MAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

8. Calcium chloride is used to melt ice and snow on roads and sidewalks and to remove water from organic liquids. Calculate the molarity of a solution prepared by diluting 165 mL of 0.688 M calcium chloride to 925.0 mL.

A. 3.86 M

B. 0.743 M

C. 0.222 M

D. 0.123 M

E. 0.114 MAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

9. What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

A. 330 mL

B. 210 mL

C. 86 mL

D. 60 mL

E. 7.3 mLAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

10. What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

A. 0.800 L

B. 0.400 L

C. 0.200 L

D. 0.100 L

E. None of these choices are correct.Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

11. How many mL of concentrated nitric acid (HNO₃, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

A. 32.0 mL

B. 62.5 mL

C. 125 mL

D. 250. mL

E. 500. mLAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

12. Potassium chloride, KCl, sodium sulfate, Na₂SO₄, glucose, C₆H₁₂O₆, carbon dioxide, CO₂ and ammonium phosphate, (NH₄)₃PO₄, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

A. KCI

B. Na₂SO₄

C. C₆H₁₂O₆

D. CO₂

E. (NH₄)₃PO₄Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

13. Potassium carbonate, K₂CO₃, sodium iodide, NaI, potassium bromide, KBr, methanol, CH₃OH, and ammonium chloride, NH₄Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

A. K₂CO₃

B. NaI

C. KBr

D. CH₃OH

E. NH₄ClAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

14. How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

A. 0.81 mol

B. 0.54 mol

C. 0.27 mol

D. 0.18 mol

E. 0.090 molAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

15. How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH₄)₃PO₄, is dissolved in water?

A. 0.40 mol

B. 1.6 mol

C. 3.2 mol

D. 4.8 mol

E. 6.4 molAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

16. How many moles of H⁺(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

A. 1.2 mol

B. 0.98 mol

C. 0.87 mol

D. 0.65 mol

E. 0.49 molAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

17. How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?

A. 0.60 mol

B. 0.75 mol

C. 0.94 mol

D. 1.7 mol

E. 1.9 molAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

18. How many sodium ions are present in 325 mL of 0.850 M Na₂SO₄?

A. 1.66 × 10²³ sodium ions

B. 3.33 × 10²³ sodium ions

C. 4.99 × 10²³ sodium ions

D. 6.20 × 10²³ sodium ions

E. 1.57 × 10²⁴ sodium ionsAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

19. Which of the following is most soluble in water?

A. benzene, C₆H₆

B. potassium nitrate, KNO₃

C. carbon tetrachloride, CCl₄

D. hexane, C₆H₁₄

E. ethane, C₂H₄Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Polar Nature of Water

Topic: Aqueous Solutions

20. Which of the following will be least soluble in water?

A. potassium sulfate, K₂SO₄

B. ammonium nitrate, NH₄NO₃

C. chloromethane, CH₃Cl

D. calcium chloride, CaCl₂

E. ethanol, C₂H₆OAccessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Polar Nature of Water

Topic: Aqueous Solutions

21. Which one of the following ionic compounds is insoluble in water?

A. Na₃PO₄

B. AgNO₃

C. NaCl

D. CaCO₃

E. MgCl₂Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Polar Nature of Water

Topic: Aqueous Solutions

22. Which one of the following ionic compounds is soluble in water?

A. Na₂S

B. PbI₂

C. AgCl

D. CuS

E. Ca₃(PO₄)₂Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Polar Nature of Water

Topic: Aqueous Solutions

23. Which of the following solutions will be the poorest conductor of electrical current?

A. sucrose, C₁₂H₂₂O₁₁(aq)

B. sodium chloride, NaCl(aq)

C. potassium nitrate, KNO₃(aq)

D. lithium hydroxide, LiOH(aq)

E. sulfuric acid, H₂SO₄(aq)Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

24. Which of the following solutions will be the best conductor of electrical current?

A. methyl alcohol, CH₃OH(aq)

B. glucose, C₆H₁₂O₆(aq)

C. potassium chloride, KCl(aq)

D. bromine, Br₂(aq)

E. ethylene glycol, C₂H₆O₂(aq)Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

25. 1.0 M aqueous solutions of the following substances are prepared. Which one would you expect to have the lowest electrical conductivity?

A. NaOH

B. CH₃CH₂OH (ethanol)

C. KBr

D. CH₃COOH (acetic acid)

E. HClO₄Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

26. Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

A. CaCl₂

B. HNO₃

C. NH₃

D. C₆H₁₂O₆ (glucose)

E. CO₂Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

27. Which one of the following substances is the best electrolyte?

A. CO

B. CH₃Cl

C. CH₄

D. C₂H₅OH

E. HClAccessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

28. In the following reaction, what ions, if any, are spectator ions?

Pb(NO₃)₂(aq) + 2NaCl(aq) → PbCl₂(s) + 2NaNO₃(aq)

A. Pb²⁺(aq), Cl^–(aq)

B. Na⁺(aq), NO₃^–(aq)

C. Pb²⁺(aq), NO₃^–(aq)

D. Na⁺(aq), Cl^–(aq)

E. There are no spectator ions.Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

29. What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

A. H⁺ and OH^–

B. H⁺ and Rb⁺

C. Rb⁺ and Br^–

D. Br^– and OH^–

E. There are no spectator ions in this reaction.Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

30. Magnesium carbonate, MgCO₃, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

A. Mg²⁺ and CO₃^2–

B. Na⁺ and Cl^–

C. Mg²⁺ and Cl^–

D. Na⁺ and CO₃^2–

E. None of these choices are correct.Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

31. Select the precipitate that forms when the following reactants are mixed.

Na₂CO₃(aq) + BaCl₂(aq) →

A. Ba₂CO₃

B. BaCO₃

C. NaCl

D. NaCl₂

E. BaOAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

32. Select the precipitate that forms when the following reactants are mixed.

Mg(CH₃COO)₂(aq) + LiOH(aq) →

A. LiCH₃COO

B. Li(CH₃COO)₂

C. MgOH

D. Mg(OH)₂

E. CH₃OHAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

33. Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II) nitrate.

A. CuS

B. Cu₂S

C. NH₄NO₃

D. NH₄(NO₃)₂

E. CuSO₄Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

34. Select the precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate.

A. NaNO₃

B. Na₂NO₃

C. PbSO₄

D. Pb₂SO₄

E. PbSAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

35. Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed.

CuCl₂(aq) + Na₂CO₃(aq) →

A. copper(I) carbonate, Cu₂CO₃

B. copper(II) carbonate, Cu₂CO₃

C. copper(I) carbonate, CuCO₃

D. copper(II) carbonate, CuCO₃

E. sodium chloride, NaClAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

36. Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed.

CoSO₄(aq) + (NH₄)₃PO₄(aq) →

A. cobalt(II) phosphate, Co₃(PO₄)₂

B. cobalt(III) phosphate, Co₃(PO₄)₂

C. cobalt(II) phosphate, CoPO₄

D. cobalt(III) phosphate, CoPO₄

E. ammonium sulfate, (NH₄)₂SO₄Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

37. Select the net ionic equation for the reaction between sodium chloride and mercury(I) nitrate.

2NaCl(aq) + Hg₂(NO₃)₂(aq) → 2NaNO₃(aq) + Hg₂Cl₂(s)

A. Na⁺(aq) + NO₃^–(aq) → NaNO₃(aq)

B. Hg₂²⁺(aq) + 2Cl^–(aq) → Hg₂Cl₂(s)

C. NaCl(aq) → Na⁺(aq) + Cl^–(aq)

D. Hg₂(NO₃)₂(aq) → Hg₂²⁺(aq) + 2NO₃^–(aq)

E. Hg₂²⁺(aq) → Hg₂(s)Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

38. Consider the reaction:

3Co₂₊(aq) + 6NO₃(aq) + 6Na₊(aq) + 2PO₄3–(aq) → Co₃(PO₄)₂(s) + 6Na₊(aq) + 6NO₃(aq)

Identify the net ionic equation for this reaction.

A. Na⁺(aq) + NO₃^–(aq) → NaNO₃(aq)

B. 3Co²⁺(aq) + NO₃^–(aq) + Na⁺(aq) + 2PO₄^3–(aq) → Co₃(PO₄)₂(s) + NaNO₃(aq)

C. 3Co²⁺(aq) + 6NO₃^–(aq) + 6Na⁺(aq) + 2PO₄^3–(aq) → Co₃(PO₄)₂(s) + 6NaNO₃(aq)

D. 3Co²⁺(aq) + 2PO₄^3–(aq) → Co₃(PO₄)₂(s)

E. None of these choices are correct.Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

39. Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl₂ are mixed with 42.0 mL of 0.600 M (NH₄)₂S? Aqueous ammonium chloride is the other product.

A. 2.41 g

B. 1.82 g

C. 1.21 g

D. 0.909 g

E. 0.044 gAccessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Limiting Reactant

Topic: Stoichiometry and Chemical Reactions

40. An acid

A. produces hydroxide ions when dissolved in water.

B. changes the color of phenolphthalein indicator from colorless to pink.

C. donates electrons in an electron transfer reaction.

D. donates protons in a proton transfer reaction.

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Acid-Base Definitions

Topic: Acids and Bases

41. A base

A. causes phenolphthalein indicator to change from colorless to pink.

B. donates a proton in a proton transfer reaction.

C. accepts electrons in an electron transfer reaction.

D. produces hydrogen ions in solution.

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Acid-Base Definitions

Topic: Acids and Bases

42. Which of the following is a weak acid?

A. H₂SO₄

B. HNO₃

C. HF

D. HBr

E. HCl

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Acid-Base Strengths

Topic: Acids and Bases

43. Which, if any, of the following properties applies to weak acids?

A. They are strong electrolytes.

B. They are excellent conductors of electricity.

C. When dissolved in water, they do not ionize completely.

D. All of these choices are correct.

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Acid-Base Strengths

Topic: Acids and Bases

44. Which of the following is a strong acid?

A. H₃PO₄

B. HNO₃

C. HF

D. CH₃COOH

E. H₂O

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Acid-Base Strengths

Topic: Acids and Bases

45. Which of the following is a strong base?

A. NH₃

B. Ca(OH)₂

C. Al(OH)₃

D. B(OH)₃

E. CH₃OH

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Acid-Base Strengths

Topic: Acids and Bases

46. Which of the following is a weak base?

A. NH₃

B. Ca(OH)₂

C. Ba(OH)₂

D. NaOH

E. CH₃COOH

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Acid-Base Strengths

Topic: Acids and Bases

47. Ammonia, NH₃, produces hydroxide ions in aqueous solution by

A. donating a proton to an acid molecule.

B. donating a proton to a water molecule.

C. donating a hydrogen ion to a water molecule.

D. accepting an electron from an acid molecule.

E. accepting a proton from a water molecule.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

48. Which one of the following substances is a strong acid?

A. HNO₃

B. H₂CO₃

C. NH₃

D. CH₃COOH

E. H₃PO₄

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Acid-Base Strengths

Topic: Acids and Bases

49. Select the correct set of products for the following reaction.

Ba(OH)₂(aq) + HNO₃(aq) →

A. BaN₂(s) + H₂O(l)

B. Ba(NO₃)₂(aq) + H₂O(l)

C. Ba(s) + H₂(g) + NO₂(g)

D. Ba₂O(s) + NO₂(g) + H₂O(l)

E. No reaction occurs.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

50. Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid.

LiOH(aq) + HBr(aq) → H₂O(l) + LiBr(aq)

A. LiOH(aq) → Li⁺(aq) + OH^–(aq)

B. HBr(aq) → H⁺(aq) + Br^–(aq)

C. H⁺(aq) + OH^–(aq) → H₂O(l)

D. Li⁺(aq) + Br^–(aq) → LiBr(aq)

E. Li⁺(aq) + OH^–(aq) + H⁺(aq) + Br^–(aq) → H₂O(l) + LiBr(aq)

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

51. A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

A. 0.0524 M

B. 0.888 M

C. 1.13 M

D. 2.26 M

E. 2.43 M

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

52. Automobile batteries use 3.0 M H₂SO₄ as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid?

H₂SO₄(aq) + 2NaOH(aq) → 2H₂O(l) + Na₂SO₄(aq)

A. 0.045 L

B. 0.28 L

C. 0.56 L

D. 0.90 L

E. 1.1 L

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

53. Vinegar is a solution of acetic acid, CH₃COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

A. 0.184%

B. 1.63%

C. 3.26%

D. 5.43%

E. 9.23%

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

54. A 0.00100 mol sample of Ca(OH)₂ requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl?

Equation: Ca(OH)₂(s) + 2HCl(aq) → CaCl₂(aq) + H₂O(l)

A. 0.0200 M

B. 0.0400 M

C. 0.0800 M

D. 4.00 × 10^–5 M

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

55. How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO₃ ( = 84.02 g/mol)?

HCl(aq) + NaHCO₃(s) → NaCl(s) + H₂O(l) + CO₂(g)

A. 638 mL

B. 572 mL

C. 536 mL

D. 276 mL

E. 175 mL

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

56. Select the best statement relating to the following reaction:

2MnO₂(s) + KClO₃(aq) + 2KOH(aq) → 2KMnO₄(aq) + KCl(aq) + H₂O(l)

A. Mn in MnO₂ is oxidized.

B. O in KClO₃ is the oxidizing agent.

C. K in KClO₃ is the reducing agent.

D. H in KOH is oxidized.

E. Cl in KClO₃ is the reducing agent.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

57. In a redox reaction, electrons are transferred

A. from the substance being oxidized to the reducing agent.

B. from the oxidizing agent to the reducing agent.

C. from the substance being reduced to the oxidizing agent.

D. from the substance being oxidized to the substance being reduced.

E. from the substance being reduced to the substance being oxidized.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

58. Calculate the oxidation number of the chlorine in perchloric acid, HClO₄, a strong oxidizing agent.

A. –1

B. +4

C. +5

D. +7

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

59. Calculate the oxidation number of sulfur in sodium metabisulfite, Na₂S₂O₅.

A. –2

B. +2

C. +4

D. +5

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

60. Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na₅P₃O₁₀.

A. +3

B. +5

C. +10

D. +15

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

61. What is the oxidation number of iodine in I₂.

A. –1

B. 0

C. +1

D. +7

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

62. The oxidation numbers of P, S, and Cl in H₂PO₂^–, H₂S, and KClO₄ are, respectively

A. –1, –1, +3.

B. –1, –2, +7.

C. +1, –2, +7.

D. –1, –2, +3.

E. +1, +2, +7.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

63. Which of the statements below correctly describes the combustion of glucose, shown below?

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

A. Hydrogen in C₆H₁₂O₆ is being reduced.

B. Oxygen in O₂ is being oxidized.

C. Hydrogen in C₆H₁₂O₆ is the reducing agent.

D. Oxygen in C₆H₁₂O₆ is the oxidizing agent.

E. Carbon in C₆H₁₂O₆ is being oxidized.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

64. Identify the oxidizing agent in the following redox reaction.

Hg₂₊(aq) + Cu(s) → Cu₂₊(aq) + Hg(l)

A. Hg²⁺(aq)

B. Cu(s)

C. Cu²⁺(aq)

D. Hg(l)

E. Hg²⁺(aq) and Cu²⁺(aq)

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

65. Sodium thiosulfate, Na₂S₂O₃, is used as a “fixer” in black and white photography. Identify the reducing agent in the reaction of thiosulfate with iodine.

2S₂O₃^2–(aq) + I₂(aq) → S₄O₆^2–(aq) + 2I^–(aq)

A. I₂(aq)

B. I^–(aq)

C. S₂O₃^2–(aq)

D. S₄O₆^2–(aq)

E. S₂O₃^2–(aq) and I^–(aq)

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

66. Which one of the following is not a redox reaction?

A. 2H₂(g) + O₂(g) → 2H₂O(l)

B. Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g)

C. H₂O(l) + NH₃(g) → NH₄⁺(aq) + OH^–(aq)

D. 6FeSO₄(aq) + K₂Cr₂O₇(aq) + 7H₂SO₄(aq) → Cr₂(SO₄)₃(aq) + 3Fe₂(SO₄)₃(aq) + K₂SO₄(aq) + 7H₂O(l)

E. Cl₂(g) + 2KBr(aq) → Br₂(l) + 2KCl(aq)

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

67. Which one of the following is not a redox reaction?

A. 2H₂O₂(aq) → 2H₂O(l) + O₂(g)

B. N₂(g) + 3H₂(g) → 2NH₃(g)

C. BaCl₂(aq) + K₂CrO₄(aq) → BaCrO₄(aq) + 2KCl(aq)

D. 2Al(s) + Fe₂O₃(s) → Al₂O₃(s) + 2Fe(s)

E. 2H₂O(g) → 2H₂(g) + O₂(g)

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

68. Which one of the following is a redox reaction?

A. 2Na(g) + Cl₂(g) → 2NaCl(s)

B. Ba²⁺(aq) + SO₄^2–(aq) → BaSO₄(s)

C. K₂Cr₂O₇(aq) + 2KOH(aq) → 2K₂CrO₄(aq) + H₂O(l)

D. Na₂CO₃(s) + 2HCl(aq) → 2NaCl(aq) + CO₂(g) + H₂O(l)

E. H₂O(l) → H⁺(aq) + OH^–(aq)

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

69. Which one of the following is not a redox reaction?

A. 2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

B. H₂(g) + Cl₂(g) → 2HCl(g)

C. 2H₂O₂(aq) → 2H₂O(l) + O₂(g)

D. Fe₂O₃(s) + 3H₂SO₄(aq) → Fe₂(SO₄)₃(aq) + 3H₂O(l)

E. 2KMnO₄(aq) + 10FeSO₄(aq) + 8H₂SO₄(aq) → K₂SO₄(aq) + 2MnSO₄(aq) + 5Fe₂(SO₄)₃(aq) + 8H₂O(l)

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

70. Identify all the spectator ions in the following reaction.

2KMnO₄(aq) + 10FeSO₄(aq) + 8H₂SO₄(aq) → K₂SO₄(aq) + 2MnSO₄(aq) + 5Fe₂(SO₄)₃(aq) +8H₂O(l)

A. only K⁺

B. only SO₄^2–

C. only K⁺ and SO₄^2–

D. only K⁺, SO₄^2–, and Fe²⁺

E. only K⁺, SO₄^2–, Fe²⁺, and Mn²⁺

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

71. The amount of calcium present in milk can be determined by adding oxalate to a sample and measuring the mass of calcium oxalate precipitated. What is the mass percent of calcium if 0.429 g of calcium oxalate forms in a 125-g sample of milk when excess aqueous sodium oxalate is added?

Na₂C₂O₄(aq) + Ca²⁺(aq) → CaC₂O₄(s) + 2Na⁺(aq)

A. 0.107%

B. 0.202%

C. 0.343%

D. 1.10%

E. 1.37%

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

72. Aqueous potassium iodate (KIO₃) and potassium iodide (KI) react in the presence of dilute hydrochloric acid, as shown below.

KIO₃(aq) + 5KI(aq) + 6HCl(aq) → 3I₂(aq) + 6KCl(aq) + 3H₂O(l)

What mass of iodine (I₂) is formed when 50.0 mL of 0.020 M KIO₃ solution reacts with an excess of KI and HCl?

A. 0.13 g I₂

B. 0.25 g I₂

C. 0.38 g I₂

D. 0.76 g I₂

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

73. Aqueous potassium iodate (KIO₃) and potassium iodide (KI) react in the presence of dilute hydrochloric acid (HCl), as shown below.

KIO₃(aq) + 5KI(aq) + 6HCl(aq) → 3I₂(aq) + 6KCl(aq) + 3H₂O(l)

What mass of iodine (I₂) is formed when 15.0 mL of 0.0050 M KIO₃ solution reacts with 30.0 mL of 0.010 M KI solution in the presence of excess HCl?

A. 0.023 g I₂

B. 0.029 g I₂

C. 0.057 g I₂

D. 0.046 g I₂

E. 0.076 g I₂

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Limiting Reactant

Topic: Stoichiometry and Chemical Reactions

74. Select the classification for the following reaction.

2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

A. Precipitation

B. Acid-base

C. Redox

D. Combination

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

75. Select the classification for the following reaction.

Fe₂₊(aq) + 2OH_–(aq) → Fe(OH)₂(s)

A. Precipitation

B. Acid-base

C. Redox

D. Decomposition

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

76. Select the classification for the following reaction.

NH₃(aq) + HNO₃(aq) → NH₄NO₃(aq)

A. Precipitation

B. Acid-base

C. Redox

D. Decomposition

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

77. Select the classification for the following reaction.

KOH(aq) + HCl(aq) → KCl(aq) + H₂O(l)

A. Precipitation

B. Acid–base

C. Redox

D. Combination

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

78. Select the classification for the following reaction.

Fe(s) + 2Fe₃₊(aq) → 3Fe₂₊(aq)

A. Precipitation

B. Acid–base

C. Redox

D. Decomposition

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

79. Select the classification for the following reaction.

BaCl₂(aq) + K₂SO₄(aq) → BaSO₄(s) + 2KCl(aq)

A. Precipitation

B. Acid–base

C. Redox

D. Decomposition

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

80. Select the classification for the following reaction.

H₂(g) + Cl₂(g) → 2HCl(g)

A. Combination

B. Decomposition

C. Displacement

D. Acid–base

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

81. The compound P₄O₁₀ is used in refining sugar. Select the classification for the reaction in which it is synthesized.

P₄(s) + 5O₂(g) → P₄O₁₀(s)

A. Combination

B. Decomposition

C. Displacement

D. Acid–base

E. Precipitation

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

82. Select the classification for the following reaction.

Na₂O(s) + H₂O(l) → 2NaOH(aq)

A. Combination

B. Decomposition

C. Displacement

D. Acid–base

E. Precipitation

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

83. Select the classification for the following reaction.

2NaCl(l) 2Na(l) + Cl₂(g)

A. Acid–base

B. Precipitation

C. Combination

D. Displacement

E. Decomposition

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

84. Select the classification for the following reaction.

2H₂O₂(aq) → 2H₂O(l) + O₂(g)

A. Combination

B. Decomposition

C. Displacement

D. Acid–base

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

85. Select the classification for the following reaction.

CaCl₂·H₂O(s) CaCl₂(s) + H₂O(g)

A. Combination

B. Decomposition

C. Displacement

D. Acid–base

E. Precipitation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

86. Select the classification for the following reaction.

H₂CO₃(aq) → H₂O(l) + CO₂(g)

A. Combination

B. Decomposition

C. Displacement

D. Acid–base

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

87. Select the classification for the following reaction.

2Ag₊(aq) + Zn(s) → 2Ag(s) + Zn₂₊(aq)

A. Displacement

B. Decomposition

C. Combination

D. Precipitation

E. Acid–base

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

88. Select the classification for the following reaction.

2I_–(aq) + Cl₂(aq) → I₂(aq) + 2Cl_–(aq)

A. Combination

B. Displacement

C. Decomposition

D. Precipitation

E. Acid–base

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

89. Predict the product(s) for the following reaction.

Cl₂O₇(g) + H₂O(l) →

A. HClO₄(aq)

B. H₂ClO₄(aq)

C. H(ClO₄)₂(aq)

D. HCl(aq) + O₂(g)

E. HClO₃(aq)

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing and Balancing Chemical Equations

Topic: Stoichiometry and Chemical Reactions

90. Predict the product(s) for the following reaction.

BaO(s) + CO₂(g) →

A. Ba(s) + CO₃(g)

B. BaCO₃(s)

C. BaO(s) + C(s)

D. Ba(s) + CO₃^2–(s)

E. No reaction occurs.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing and Balancing Chemical Equations

Topic: Stoichiometry and Chemical Reactions

91. Predict the product(s) for the following reaction.

H₂SO₄(aq) + KOH(aq) →

A. K₂SO₄(aq) + H₂O(l)

B. K₂S(aq) + H₂O(l)

C. K(s) + H₂(g) + SO₃(g)

D. KSO₄(aq) + H₂O(l)

E. No reaction occurs.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations)

Topic: Aqueous Solutions

92. Predict the product(s) for the following reaction.

MgCO₃(s)

A. MgO₂(s) + CO(g)

B. MgO(s) + CO₂

C. Mg(s) + CO₂(g) + O₂(g)

D. Mg²⁺(s) + CO₂(g) + O₂(g)

E. No reaction occurs.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing and Balancing Chemical Equations

Topic: Stoichiometry and Chemical Reactions

93. Predict the products by completing a balanced equation for the following decomposition reaction.

CaCl₂(l) ?

A. CaCl₂(l) Ca(l) + 2Cl^–(l)

B. CaCl₂(l) Ca²⁺(l) + Cl₂(g)

C. CaCl₂(l) Ca²⁺(l) + 2Cl^–(l)

D. CaCl₂(l) Ca(l) + Cl₂(g)

E. CaCl₂(l) CaCl(l) + Cl^–(l)

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing and Balancing Chemical Equations

Topic: Stoichiometry and Chemical Reactions

94. The correct method for preparing one liter of a 1.0 M solution of X is to dissolve exactly one mole of X in exactly one liter of water.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

95. When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Units of Concentration

Topic: Aqueous Solutions

96. Some covalent compounds dissolve in water to produce conducting solutions.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

97. Covalent compounds, dissolved in water, never produce conducting solutions.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Aqueous Solutions

98. In an acid-base (neutralization) reaction the indicator will change color at the end point.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

99. In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

100. All acid-base reactions produce a salt and water as the only products.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

101. A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

102. Oxidation is associated with an increase in oxidation number.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

103. Reduction is the loss of electrons.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

104. In a redox reaction, the reducing agent undergoes loss of electrons.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

105. In a redox reaction, the oxidizing agent undergoes loss of electrons.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Topic: Electrochemistry

106. All combustion reactions are classified as combination reactions.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing)

Subtopic: Stoichiometry and Chemical Reactions

107. The combustion of an element is always a combination reaction.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

Topic: Stoichiometry and Chemical Reactions

108. A combination reaction may also be a displacement reaction.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Stoichiometry and Chemical Reactions

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.)

109. During a titration, the following data were collected. A 25 mL portion of an unknown acid solution was titrated

with 1.0 M NaOH. It required 65 mL of the base to neutralize the sample. How many moles of acid are present in 3.0 liters of this unknown solution?

A. 2.6 moles

B. 0.9 moles

C. 8.7 moles

D. 7.8 moles

E. 5.6 moles

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Calculating Amounts of Reactant and Product (including solutions)

Topic: Stoichiometry and Chemical Reactions

110. What volume of a 0.100 M solution of HCl is required to neutralize a solution prepared by dissolving 10.0 g of KOH in 250 ml of H2O?

A. 0.178 L

B. 0.25 L

C. 0.71 L

D. 1.78 L

E. 178 L

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Topic: Stoichiometry and Chemical Reactions

111. What are the products when aqueous solutions of HCl and Na₂CO₃ react?

A. NaCl and HCO₃

B. NaCl, H₂O and CO₂

C. NaCl and HCO₃^-

D. NaH and Cl₂CO₃

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Ions in Water (Electrolytes)

Topic: Stoichiometry and Chemical Reactions

Category # of Questions

Accessibility: Keyboard Navigation 104

Bloom's: 1. Remember 24

Bloom's: 2. Understand 30

Bloom's: 3. Apply 57

Difficulty: Easy 59

Difficulty: Hard 3

Difficulty: Medium 45

Difficulty: Easy 1

Difficulty: Medium 3

Gradable: automatic 111

Subtopic: Acid-Base Definitions 2

Subtopic: Acid-Base Strengths 6

Subtopic: Calculating Amounts of Reactant and Product (including solutions) 8

Subtopic: Ions in Water (Electrolytes) 15

Subtopic: Limiting Reactant 2

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definition and Balancing) 15

Subtopic: Polar Nature of Water 4

Subtopic: Stoichiometry and Chemical Reactions 2

Subtopic: Types of Chemical Reactions (Acid-Base, REDOX, Displacement, etc.) 26

Subtopic: Units of Concentration 13

Subtopic: Writing and Balancing Chemical Equations 4

Subtopic: Writing Equations for Aqueous Ionic Reactions (Molecular, Total and Net Ionic Equations) 15

Topic: Acids and Bases 8

Topic: Aqueous Solutions 46

Topic: Electrochemistry 2

Topic: Electrochemistry 12

Topic: Stoichiometry and Chemical Reactions 41