Question 1

What is the concentration of H+ in a 2.5 M HCl solution?

Accepted Answer

A)  0
B)  1.3 M
C)  2.5 M
D)  5.0 M
E)  10.MF) B) and D)
G) D) and E)

Question 2

Rain collected on a remote island in the Pacific assumed to be unaffected by human pollution.The pH of the rainwater on this island was not 7.Do you expect the pH to be greater than 7 or less than 7? Explain your reasoning.

Accepted Answer

The pH is expected to be less ...

Question 3

Which one of these net ionic equations represents the reaction of a strong acid with a weak base?

Accepted Answer

A)  H+(aq) + OH-(aq)  →\rarr→ H2O(aq) 
B)  H+(aq) + CH3NH2(aq)  →\rarr→ CH3NH3+(aq) 
C)  OH-(aq) + HCN(aq)  →\rarr→ H2O(aq) + CN-(aq) 
D)  HCN(aq) + CH3NH2(aq)  →\rarr→ CH3NH3+  (aq) + CN-(aq)  E) B) and C)
F) A) and D)

Question 4

The pH of a certain solution is 3.0. How many H+(aq) ions are there in 1.0 L of the solution?

Accepted Answer

A)  0.001 ions
B)  1,000 ions
C)  6.* 1020 ions
D)  3 ions
E)  6.* 1026 ionsF) B) and C)
G) None of the above

Question 5

For H3PO4, Ka1 = 7.3 * 10-3, Ka2 = 6.2 *10-6, and Ka3 = 4.8 *10-13. An aqueous solution of Na3PO4 therefore would be

Accepted Answer

A)  neutral
B)  basic
C)  acidicD) A) and C)
E) None of the above

Question 6

Predict the direction in which the equilibrium will lie for the reaction H2SO3(aq) + HCO3- (aq)  2SO3(aq) + HCO3- (aq)    HSO3-(aq) + H2CO3(aq) . Ka1(H2SO3) = 1 * 10-2; Ka1(H2CO3) = 4.2 * 10-7 A) to the right B) to the left C) in the middle" class="answers-bank-image d-inline" rel="preload" > HSO3-(aq) + H2CO3(aq) .
Ka1(H2SO3) = 1 * 10-2; Ka1(H2CO3) = 4.2 * 10-7

Accepted Answer

A)  to the right
B)  to the left
C)  in the middleD) B) and C)
E) A) and C)

Question 7

Calculate the pH of a 0.10 M HCN solution that is 0.0070% ionized.

Accepted Answer

A)  1.00
B)  0.00070
C)  3.15
D)  5.15
E)  7.00F) B) and D)
G) B) and E)

Question 8

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 9

In the reaction Ag+(aq)+ Cl-(aq)$\rarr$ AgCl(s), Ag+ acts as a Lewis acid.

Accepted Answer

A) True 
 B)False

Question 10

Calculate the pH of a 3.5 * 10-3 M HNO3 solution.

Accepted Answer

A)  -2.46
B)  0.54
C)  2.46
D)  3.00
E)  3.46F) A) and D)
G) C) and D)

Question 11

What is the pH of an aqueous solution that contains 2.7 *1020 H3O+ ions per liter of solution?

Accepted Answer

A)  2.70
B)  3.35
C)  6.02
D)  10.65
E)  11.30F) A) and B)
G) A) and C)

Question 12

Write the chemical formula for hydrochloric acid.

Accepted Answer

The answer of Write the chemical formula for hydrochloric acid....

Question 13

Will a 0.1 M solution of NaH2PO4(aq)be acidic, basic, or neutral?

Accepted Answer

Question 14

If the pH of an acid rain storm is approximately 3.0, how many times greater is the [H+] in the rain than in a cup of coffee having a pH of 5.0?

Accepted Answer

A)  1000
B)  100
C)  20
D)  1.7
E)  0.60F) A) and B)
G) A) and C)

Question 15

In 0.10 M KCN, the chemical species with the highest concentration (except H2O) is

Accepted Answer

A)  Na+
B)  CN-
C)  H3O+ (or H+) 
D)  OH-
E)  K+F) A) and E)
G) B) and E)

Question 16

Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 102 mL of solution.

Accepted Answer

A)  1.35
B)  2.35
C)  7.00
D)  11.65
E)  12.65F) B) and D)
G) A) and B)

Question 17

Which one of these equations represents the reaction of a weak acid with a strong base?

Accepted Answer

A)  H+(aq) + OH-(aq)  →\rarr→ H2O(aq) 
B)  H+(aq) + CH3NH2(aq)  →\rarr→ CH3NH3+(aq) 
C)  OH-(aq) + HCN(aq)  →\rarr→ H2O(aq) + CN-(aq) 
D)  HCN(aq) + CH3NH2(aq)  →\rarr→ CH3NH3+(aq) + CN-(aq)  E) C) and D)
F) B) and C)

Question 18

Arrange the acids HBr, H2Se, and H3As in order of increasing acid strength.

Accepted Answer

A)  HBr 2Se 3As
B)  HBr 3As 2Se
C)  H2Se 3As 
D)  H3As 2Se 
E)  H3As 2SeF) A) and C)
G) A) and D)

Question 19

Suppose that ammonia, applied to a field as a fertilizer, is washed into a farm pond containing 3.0 * 106 L of water. If the pH of this pond is found to be 9.81, what volume of liquid ammonia found its way into the pond? [Given: Kb(NH3) = 1.8 * 10-5; the density of liquid ammonia is 0.771 g/cm3]

Accepted Answer

A)  15 L
B)  25 L
C)  11 L
D)  19 L
E)  320 LF) B) and E)
G) B) and D)

Question 20

Which response gives the products of hydrolysis of KF?

Accepted Answer

A)  KOH + HF
B)  OH- + HF
C)  KOH + H+ + F-
D)  KH + F- + OH-
E)  No hydrolysis occurs.F) A) and C)
G) C) and D)

Exam 15: Acids and Bases

Which one of these equations represents the reaction of a weak acid with a strong base?

Correct Answer
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Predict the direction in which the equilibrium will lie for the reaction H₂SO₃(aq) + HCO₃^-(aq) HSO₃^-(aq) + H₂CO₃(aq) . K_a1(H₂SO₃) = 1 * 10^-2; K_a1(H₂CO₃) = 4.2 * 10^-7

Correct Answer
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Rain collected on a remote island in the Pacific assumed to be unaffected by human pollution.The pH of the rainwater on this island was not 7.Do you expect the pH to be greater than 7 or less than 7? Explain your reasoning.

Correct Answer
verified
The pH is expected to be less ...
View Answer

Will a 0.1 M solution of NaH₂PO₄(aq)be acidic, basic, or neutral?

Correct Answer
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Which one of these net ionic equations represents the reaction of a strong acid with a weak base?

Correct Answer
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Correct Answer
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In the reaction Ag⁺(aq)+ Cl^-(aq) $\rarr$ AgCl(s), Ag⁺ acts as a Lewis acid.

Correct Answer
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In 0.10 M KCN, the chemical species with the highest concentration (except H₂O) is

Correct Answer
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Arrange the acids HBr, H₂Se, and H₃As in order of increasing acid strength.

Correct Answer
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Calculate the pH of a 0.10 M HCN solution that is 0.0070% ionized.

Correct Answer
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If the pH of an acid rain storm is approximately 3.0, how many times greater is the [H⁺] in the rain than in a cup of coffee having a pH of 5.0?

Correct Answer
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The pH of a certain solution is 3.0. How many H⁺(aq) ions are there in 1.0 L of the solution?

Correct Answer
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What is the pH of an aqueous solution that contains 2.7 *10²⁰ H₃O⁺ ions per liter of solution?

Correct Answer
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Which response gives the products of hydrolysis of KF?

Correct Answer
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Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 10² mL of solution.

Correct Answer
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Write the chemical formula for hydrochloric acid.

Correct Answer
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For H₃PO₄, K_a1 = 7.3 * 10^-3, K_a2 = 6.2 10^-6, and K_a3 = 4.8 10^-13. An aqueous solution of Na₃PO₄ therefore would be

Correct Answer
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Calculate the pH of a 3.5 * 10^-3 M HNO₃ solution.

Correct Answer
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What is the concentration of H⁺ in a 2.5 M HCl solution?

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
verified
1.4 * 10
View Answer

Exam 15: Acids and Bases

Which one of these equations represents the reaction of a weak acid with a strong base?

Correct AnswerverifiedShow Answer

Predict the direction in which the equilibrium will lie for the reaction H2SO3(aq) + HCO3- (aq) HSO3-(aq) + H2CO3(aq) . Ka1(H2SO3) = 1 * 10-2; Ka1(H2CO3) = 4.2 * 10-7

Correct AnswerverifiedShow Answer

Rain collected on a remote island in the Pacific assumed to be unaffected by human pollution.The pH of the rainwater on this island was not 7.Do you expect the pH to be greater than 7 or less than 7? Explain your reasoning.

Correct AnswerverifiedThe pH is expected to be less ...View AnswerShow Answer

Will a 0.1 M solution of NaH2PO4(aq)be acidic, basic, or neutral?

Correct AnswerverifiedShow Answer

Which one of these net ionic equations represents the reaction of a strong acid with a weak base?

Correct AnswerverifiedShow Answer

Suppose that ammonia, applied to a field as a fertilizer, is washed into a farm pond containing 3.0 * 106 L of water. If the pH of this pond is found to be 9.81, what volume of liquid ammonia found its way into the pond? [Given: Kb(NH3) = 1.8 * 10-5; the density of liquid ammonia is 0.771 g/cm3]

Correct AnswerverifiedShow Answer

In the reaction Ag+(aq)+ Cl-(aq) →\rarr→ AgCl(s), Ag+ acts as a Lewis acid.

Correct AnswerverifiedShow Answer

In 0.10 M KCN, the chemical species with the highest concentration (except H2O) is

Correct AnswerverifiedShow Answer

Arrange the acids HBr, H2Se, and H3As in order of increasing acid strength.

Correct AnswerverifiedShow Answer

Calculate the pH of a 0.10 M HCN solution that is 0.0070% ionized.

Correct AnswerverifiedShow Answer

If the pH of an acid rain storm is approximately 3.0, how many times greater is the [H+] in the rain than in a cup of coffee having a pH of 5.0?

Correct AnswerverifiedShow Answer

The pH of a certain solution is 3.0. How many H+(aq) ions are there in 1.0 L of the solution?

Correct AnswerverifiedShow Answer

What is the pH of an aqueous solution that contains 2.7 *1020 H3O+ ions per liter of solution?

Correct AnswerverifiedShow Answer

Which response gives the products of hydrolysis of KF?

Correct AnswerverifiedShow Answer

Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 102 mL of solution.

Correct AnswerverifiedShow Answer

Write the chemical formula for hydrochloric acid.

Correct AnswerverifiedShow Answer

For H3PO4, Ka1 = 7.3 * 10-3, Ka2 = 6.2 *10-6, and Ka3 = 4.8 *10-13. An aqueous solution of Na3PO4 therefore would be

Correct AnswerverifiedShow Answer

Calculate the pH of a 3.5 * 10-3 M HNO3 solution.

Correct AnswerverifiedShow Answer

What is the concentration of H+ in a 2.5 M HCl solution?

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

Correct Answer
verified

Predict the direction in which the equilibrium will lie for the reaction H₂SO₃(aq) + HCO₃^-(aq) HSO₃^-(aq) + H₂CO₃(aq) . K_a1(H₂SO₃) = 1 * 10^-2; K_a1(H₂CO₃) = 4.2 * 10^-7

Correct Answer
verified

Correct Answer
verified
The pH is expected to be less ...
View Answer

Will a 0.1 M solution of NaH₂PO₄(aq)be acidic, basic, or neutral?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the reaction Ag⁺(aq)+ Cl^-(aq) $\rarr$ AgCl(s), Ag⁺ acts as a Lewis acid.

Correct Answer
verified

In 0.10 M KCN, the chemical species with the highest concentration (except H₂O) is

Correct Answer
verified

Arrange the acids HBr, H₂Se, and H₃As in order of increasing acid strength.

Correct Answer
verified

Correct Answer
verified

If the pH of an acid rain storm is approximately 3.0, how many times greater is the [H⁺] in the rain than in a cup of coffee having a pH of 5.0?

Correct Answer
verified

The pH of a certain solution is 3.0. How many H⁺(aq) ions are there in 1.0 L of the solution?

Correct Answer
verified

What is the pH of an aqueous solution that contains 2.7 *10²⁰ H₃O⁺ ions per liter of solution?

Correct Answer
verified

Correct Answer
verified

Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 10² mL of solution.

Correct Answer
verified

Correct Answer
verified

For H₃PO₄, K_a1 = 7.3 * 10^-3, K_a2 = 6.2 10^-6, and K_a3 = 4.8 10^-13. An aqueous solution of Na₃PO₄ therefore would be

Correct Answer
verified

Calculate the pH of a 3.5 * 10^-3 M HNO₃ solution.

Correct Answer
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What is the concentration of H⁺ in a 2.5 M HCl solution?

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
verified
1.4 * 10
View Answer