Question 1

Will a 0.1 M solution of NH4NO2(aq)be acidic, basic, or neutral?

Accepted Answer

Question 2

The pH of a Ba(OH) 2 solution is 10.00. What is the H+ ion concentration of this solution?

Accepted Answer

A)  4.0 * 10-11 M
B)  1.6 * 10-10 M
C)  1.3 * 10-5 M
D)  1.0 * 10-10 M
E)  10. MF) None of the above
G) A) and B)

Question 3

The compound CH3NH2 reacts with water to form CH3NH3+ and OH-. What role does CH3NH2 play in this reaction?

Accepted Answer

Question 4

Morphine, C17H19NO3, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, Kb = 1.62 * 10-6.)

Accepted Answer

A)  9.57
B)  9.08
C)  3.79
D)  9.87
E)  4.43F) B) and D)
G) A) and B)

Question 5

Write the chemical formula for the acid formed when Cl2O5 is dissolved in water.

Accepted Answer

Question 6

Hard water deposits (calcium carbonate) have built up around your bathroom sink. Which one of these substances would be most effective in dissolving the deposits?

Accepted Answer

A)  ammonia
B)  bleach (sodium hypochlorite) 
C)  lye (sodium hydroxide) 
D)  vinegar (acetic acid) E) B) and C)
F) A) and D)

Question 7

Lime is used in farming to reduce the acidity of the soil. The chemical name for lime is calcium oxide. When water in the soil reacts with lime, what base is formed?

Accepted Answer

The answer of Lime is used in farming to reduce...

Question 8

Calculate the concentration of oxalate ion (C2O42-) in a 0.175 M solution of oxalic acid (C2H2O4) . [For oxalic acid, Ka1 = 6.5 * 10-2, Ka2 = 6.1 * 10-5.]

Accepted Answer

A)  0.11 M
B)  6.1 * 10-5 M
C)  4.0 * 10-6 M
D)  0.0791 M
E)  0.175 MF) B) and E)
G) B) and C)

Question 9

A solution with a pH of 8 has a hydrogen ion concentration [H+] that is 30 times greater than that of a solution of pH 11.

Accepted Answer

A) True 
 B)False

Question 10

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42-  →\rarr→  H2CO3 + PO43-

Accepted Answer

A)  H2O
B)  HCO3-
C)  H2CO3
D)  PO43-
E)  None of these. F) A) and E)
G) A) and C)

Question 11

Identify the conjugate acid of CO32- in the reaction CO32- + H2PO4-  →\rarr→ HCO3- + HPO42-

Accepted Answer

A)  H2CO3
B)  HCO3-
C)  H2O
D)  HPO42-
E)  H2PO4- F) C) and D)
G) C) and E)

Question 12

Which of these acids is stronger, H3AsO3 or H3AsO4?

Accepted Answer

Question 13

Of the two acids HBr and H2Se, H2Se is the stronger acid.

Accepted Answer

A) True 
 B)False

Question 14

Consider the weak acid CH3COOH (acetic acid) . If a 0.048 M CH3COOH solution is 5.2% ionized, determine the [H3O+] concentration at equilibrium.

Accepted Answer

A)  0.25 M
B)  9.2 * 10-3 M
C)  0.048 M
D)  0.052 M
E)  2.5 * 10-3 MF) A) and E)
G) None of the above

Question 15

The pH of coffee is approximately 5.0. How many times greater is the [H+] in coffee than in neutral water?

Accepted Answer

A)  200
B)  100
C)  5.0
D)  1.4
E)  0.01F) C) and D)
G) All of the above

Question 16

Which of these lists of molecules is arranged in order of increasing acid strength: HI, H2Te, H3Sb.

Accepted Answer

A)  H2Te 3Sb 
B)  HI 2Te 3Sb
C)  HI 3Sb 2Te
D)  H3Sb 2Te 
E)  H3Sb 2TeF) B) and C)
G) A) and D)

Question 17

When 2.0 * 10-2 mole of nicotinic acid (a monoprotic acid)is dissolved in 350. mL of water, the pH is 3.05. What is the Ka of nicotinic acid?

Accepted Answer

1.4 * 10<s...

Question 18

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3) = 1.6 * 10-1]

Accepted Answer

A)  1.52
B)  0.80
C)  0.72
D)  0.89
E)  0.66F) A) and D)
G) All of the above

Question 19

Calculate the H+ ion concentration in a 8.8 * 10-4 M Ca(OH) 2 solution.

Accepted Answer

A)  8.8 * 10-4 M
B)  1.8 * 10-3 M
C)  2.2 * 10-11 M
D)  1.1 * 10-11 M
E)  5.7 * 10-12 MF) A) and C)
G) A) and B)

Question 20

What is the OH- ion concentration in a 5.2 * 10-4 M HNO3 solution?

Accepted Answer

A)  1.9 * 10-11 M
B)  1.0 * 10-7 M
C)  5.2 * 10-4 M
D)  zero
E)  1.0 * 10-4 MF) D) and E)
G) A) and E)

Exam 16: Acids and Bases

The pH of coffee is approximately 5.0. How many times greater is the [H+] in coffee than in neutral water?

Correct AnswerverifiedShow Answer

Lime is used in farming to reduce the acidity of the soil. The chemical name for lime is calcium oxide. When water in the soil reacts with lime, what base is formed?

Correct AnswerverifiedShow Answer

Calculate the concentration of oxalate ion (C2O42-) in a 0.175 M solution of oxalic acid (C2H2O4) . [For oxalic acid, Ka1 = 6.5 * 10-2, Ka2 = 6.1 * 10-5.]

Correct AnswerverifiedShow Answer

A solution with a pH of 8 has a hydrogen ion concentration [H+] that is 30 times greater than that of a solution of pH 11.

Correct AnswerverifiedShow Answer

Identify the conjugate acid of CO32- in the reaction CO32- + H2PO4- →\rarr→ HCO3- + HPO42-

Correct AnswerverifiedShow Answer

When 2.0 * 10-2 mole of nicotinic acid (a monoprotic acid)is dissolved in 350. mL of water, the pH is 3.05. What is the Ka of nicotinic acid?

Correct Answerverified1.4 * 10View AnswerShow Answer

What is the OH- ion concentration in a 5.2 * 10-4 M HNO3 solution?

Correct AnswerverifiedShow Answer

The pH of a Ba(OH) 2 solution is 10.00. What is the H+ ion concentration of this solution?

Correct AnswerverifiedShow Answer

Will a 0.1 M solution of NH4NO2(aq)be acidic, basic, or neutral?

Correct AnswerverifiedShow Answer

Write the chemical formula for the acid formed when Cl2O5 is dissolved in water.

Correct AnswerverifiedShow Answer

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42- →\rarr→ H2CO3 + PO43-

Correct AnswerverifiedShow Answer

Hard water deposits (calcium carbonate) have built up around your bathroom sink. Which one of these substances would be most effective in dissolving the deposits?

Correct AnswerverifiedShow Answer

Of the two acids HBr and H2Se, H2Se is the stronger acid.

Correct AnswerverifiedShow Answer

The compound CH3NH2 reacts with water to form CH3NH3+ and OH-. What role does CH3NH2 play in this reaction?

Correct AnswerverifiedShow Answer

Morphine, C17H19NO3, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, Kb = 1.62 * 10-6.)

Correct AnswerverifiedShow Answer

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3) = 1.6 * 10-1]

Correct AnswerverifiedShow Answer

Consider the weak acid CH3COOH (acetic acid) . If a 0.048 M CH3COOH solution is 5.2% ionized, determine the [H3O+] concentration at equilibrium.

Correct AnswerverifiedShow Answer

Calculate the H+ ion concentration in a 8.8 * 10-4 M Ca(OH) 2 solution.

Correct AnswerverifiedShow Answer

Which of these acids is stronger, H3AsO3 or H3AsO4?

Correct AnswerverifiedShow Answer

Which of these lists of molecules is arranged in order of increasing acid strength: HI, H2Te, H3Sb.

Correct AnswerverifiedShow Answer

The pH of coffee is approximately 5.0. How many times greater is the [H⁺] in coffee than in neutral water?

Correct Answer
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Correct Answer
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Calculate the concentration of oxalate ion (C₂O₄^2-) in a 0.175 M solution of oxalic acid (C₂H₂O₄) . [For oxalic acid, K_a1 = 6.5 * 10^-2, K_a2 = 6.1 * 10^-5.]

Correct Answer
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A solution with a pH of 8 has a hydrogen ion concentration [H⁺] that is 30 times greater than that of a solution of pH 11.

Correct Answer
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Identify the conjugate acid of CO₃^2- in the reaction CO₃^2- + H₂PO₄^- $\rarr$ HCO₃^- + HPO₄^2-

Correct Answer
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When 2.0 * 10^-2 mole of nicotinic acid (a monoprotic acid)is dissolved in 350. mL of water, the pH is 3.05. What is the K_a of nicotinic acid?

Correct Answer
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1.4 * 10
View Answer

What is the OH^- ion concentration in a 5.2 * 10^-4 M HNO₃ solution?

Correct Answer
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The pH of a Ba(OH) ₂ solution is 10.00. What is the H⁺ ion concentration of this solution?

Correct Answer
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Will a 0.1 M solution of NH₄NO₂(aq)be acidic, basic, or neutral?

Correct Answer
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Write the chemical formula for the acid formed when Cl₂O₅ is dissolved in water.

Correct Answer
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Identify the conjugate base of HPO₄^2- in the reaction HCO₃^- + HPO₄^2- $\rarr$ H₂CO₃ + PO₄^3-

Correct Answer
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Correct Answer
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Of the two acids HBr and H₂Se, H₂Se is the stronger acid.

Correct Answer
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The compound CH₃NH₂ reacts with water to form CH₃NH₃⁺ and OH^-. What role does CH₃NH₂ play in this reaction?

Correct Answer
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Morphine, C₁₇H₁₉NO₃, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, K_b = 1.62 * 10^-6.)

Correct Answer
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What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO₃? [K_a(HIO₃) = 1.6 * 10^-1]

Correct Answer
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Consider the weak acid CH₃COOH (acetic acid) . If a 0.048 M CH₃COOH solution is 5.2% ionized, determine the [H₃O⁺] concentration at equilibrium.

Correct Answer
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Calculate the H⁺ ion concentration in a 8.8 * 10^-4 M Ca(OH) ₂ solution.

Correct Answer
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Which of these acids is stronger, H₃AsO₃ or H₃AsO₄?

Correct Answer
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Which of these lists of molecules is arranged in order of increasing acid strength: HI, H₂Te, H₃Sb.

Correct Answer
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