Question 1

Calculate the pH of a solution that has [OH-] = 3.1 × 10-8 M.

Accepted Answer

A)  pH = 3.10
B)  pH = 8.00
C)  pH = 7.51
D)  pH = 3.18
E)  pH = 6.49

Question 2

Calculate the pH of a solution that has [H3O+] = 5.2 × 10-7 M.

Accepted Answer

A)  pH = 5.20
B)  pH = 6.28
C)  pH = 7.00
D)  pH = 5.27
E)  pH = 7.72

Question 3

The substance NH3(aq) is

Accepted Answer

A)  a strong acid.
B)  a weak acid.
C)  a strong base.
D)  a weak base.
E)  neither an acid nor a base.

Question 4

The image shows a molecular-level representation of part of a solution after HF is dissolved in water. (Besides water, there are 6 HF molecules, 1 H3O+ ion, and 1 F− ion present in the solution.) Which of the following best describes HF? 3O+ ion, and 1 F− ion present in the solution.) Which of the following best describes HF?   A) strong acid B) strong base C) weak acid D) weak base E) amphoteric" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  strong acid
B)  strong base
C)  weak acid
D)  weak base
E)  amphoteric

Question 5

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH3 3   A) I = HCl, II = HF, III = NH3 B) I = HF, II = HCl, III = NH3 C) I = HF, II = NH3, III = HCl D) I = NH3, II = HF, III = HCl E) I = NH3, II = HCl, III = HF" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I = HCl, II = HF, III = NH3
B)  I = HF, II = HCl, III = NH3
C)  I = HF, II = NH3, III = HCl
D)  I = NH3, II = HF, III = HCl
E)  I = NH3, II = HCl, III = HF

Question 6

In polyprotic acids, the first ionizable hydrogen always ionizes to a greater extent than the second or third ionizable hydrogen(s).

Accepted Answer

A) True 
 B)False

Question 7

The symbol In- can be used to represent the base form of an indicator.

Accepted Answer

A) True 
 B)False

Question 8

Select the two Brønsted-Lowry bases in the following equation: CH3NH2(aq) + H2O(l) ⇌ CH3NH3+(aq) + OH−(aq)

Accepted Answer

A)  CH3NH2 and H2O
B)  CH3NH2 and OH−
C)  H2O and OH−
D)  CH3NH2 and CH3NH3+
E)  CH3NH3+ and OH−

Question 9

When the following reaction goes in the reverse direction (from products to reactants) , what is the acid? HCN(aq) + H2O(l) ⇌ CN− (aq) + H3O+(aq)

Accepted Answer

A)  HCN
B)  H2O
C)  CN−
D)  H3O+
E)  both CN− and H3O+

Question 10

What is the pH of a 0.020 M KOH solution?

Accepted Answer

A)  0.020
B)  1.70
C)  7.00
D)  12.30
E)  −1.70

Question 11

If the pOH of a coffee sample is 8.85, what is the H3O+ concentration in the coffee?

Accepted Answer

A)  5.2 M
B)  7.1 × 10-8 M
C)  7.1 × 10-7 M
D)  7.1 × 10-6 M
E)  8.8 M

Question 12

Which of the following equations represents the behavior of H2PO4- as an acid?

Accepted Answer

A)  H2PO4-(aq) + H3O+(aq) ⇌ H3PO4(aq) + H2O(l) 
B)  H2PO4-(aq) + HF(aq) ⇌ H3PO4(aq) + F-(aq) 
C)  H2PO4-(aq) + HCN(aq) ⇌ H3PO4(aq) + CN-(aq) 
D)  H2PO4-(aq) + OH-(aq) ⇌ HPO42-(aq) + H2O(l) 
E)  H2PO4-(aq) + H2O(l) ⇌ H3PO4(aq) + OH-(aq)

Question 13

When the following reaction goes in the reverse direction (from products to reactants) , what is the base? HF(aq) + H2O(l) ⇌ F−(aq) + H3O+(aq)

Accepted Answer

A)  HF
B)  H2O
C)  F−
D)  H3O+
E)  both F− and H3O+

Question 14

The Ka for acetic acid is 1.8 × 10-5. Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

Accepted Answer

A)  The pH is greater than 0 but less than 2.
B)  The pH is exactly 2.
C)  The pH is greater than 2 but less than 7.
D)  The pH is exactly 7.
E)  The pH is greater than 7 but less than 12.

Question 15

List the species present in order of increasing concentration in a 0.1 M solution of H2S.

Accepted Answer

A)  H2S - 2-
B)  H2S 2- -
C)  S2- - 2S
D)  HS- 2- 2S
E)  S2- 2S -

Question 16

The H3O+ concentration in a 0.050 M solution of HClO4 is 0.050 M.

Accepted Answer

A) True 
 B)False

Question 17

Would you expect the pH of a 0.010 M solution of HF to be less than, greater than, or equal to 2.00? Explain.

Accepted Answer

To determine whether the pH of a 0.010 M...

Exam 13: Acids and Bases

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH₃

Correct Answer
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Calculate the pH of a solution that has [OH^-] = 3.1 × 10^-8 M.

Correct Answer
verified

In polyprotic acids, the first ionizable hydrogen always ionizes to a greater extent than the second or third ionizable hydrogen(s).

Correct Answer
verified

Would you expect the pH of a 0.010 M solution of HF to be less than, greater than, or equal to 2.00? Explain.

Correct Answer
Answered by ExamLex AI
To determine whether the pH of a 0.010 M...
View Answer

When the following reaction goes in the reverse direction (from products to reactants) , what is the acid? HCN(aq) + H₂O(l) ⇌ CN⁻ (aq) + H₃O⁺(aq)

Correct Answer
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If the pOH of a coffee sample is 8.85, what is the H₃O⁺ concentration in the coffee?

Correct Answer
verified

The K_a for acetic acid is 1.8 × 10^-5. Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

Correct Answer
verified

What is the pH of a 0.020 M KOH solution?

Correct Answer
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The H₃O⁺ concentration in a 0.050 M solution of HClO₄ is 0.050 M.

Correct Answer
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The image shows a molecular-level representation of part of a solution after HF is dissolved in water. (Besides water, there are 6 HF molecules, 1 H₃O⁺ ion, and 1 F⁻ ion present in the solution.) Which of the following best describes HF?

Correct Answer
verified

The symbol In^- can be used to represent the base form of an indicator.

Correct Answer
verified

When the following reaction goes in the reverse direction (from products to reactants) , what is the base? HF(aq) + H₂O(l) ⇌ F⁻(aq) + H₃O⁺(aq)

Correct Answer
verified

Select the two Brønsted-Lowry bases in the following equation: CH₃NH₂(aq) + H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH⁻(aq)

Correct Answer
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List the species present in order of increasing concentration in a 0.1 M solution of H₂S.

Correct Answer
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Which of the following equations represents the behavior of H₂PO₄^- as an acid?

Correct Answer
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Calculate the pH of a solution that has [H₃O⁺] = 5.2 × 10^-7 M.

Correct Answer
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The substance NH₃(aq) is

Correct Answer
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Exam 13: Acids and Bases

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH3

Correct AnswerverifiedShow Answer

Calculate the pH of a solution that has [OH-] = 3.1 × 10-8 M.

Correct AnswerverifiedShow Answer

In polyprotic acids, the first ionizable hydrogen always ionizes to a greater extent than the second or third ionizable hydrogen(s).

Correct AnswerverifiedShow Answer

Would you expect the pH of a 0.010 M solution of HF to be less than, greater than, or equal to 2.00? Explain.

Correct AnswerAnswered by ExamLex AITo determine whether the pH of a 0.010 M...View AnswerShow Answer

When the following reaction goes in the reverse direction (from products to reactants) , what is the acid? HCN(aq) + H2O(l) ⇌ CN− (aq) + H3O+(aq)

Correct AnswerverifiedShow Answer

If the pOH of a coffee sample is 8.85, what is the H3O+ concentration in the coffee?

Correct AnswerverifiedShow Answer

The Ka for acetic acid is 1.8 × 10-5. Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

Correct AnswerverifiedShow Answer

What is the pH of a 0.020 M KOH solution?

Correct AnswerverifiedShow Answer

The H3O+ concentration in a 0.050 M solution of HClO4 is 0.050 M.

Correct AnswerverifiedShow Answer

The image shows a molecular-level representation of part of a solution after HF is dissolved in water. (Besides water, there are 6 HF molecules, 1 H3O+ ion, and 1 F− ion present in the solution.) Which of the following best describes HF?

Correct AnswerverifiedShow Answer

The symbol In- can be used to represent the base form of an indicator.

Correct AnswerverifiedShow Answer

When the following reaction goes in the reverse direction (from products to reactants) , what is the base? HF(aq) + H2O(l) ⇌ F−(aq) + H3O+(aq)

Correct AnswerverifiedShow Answer

Select the two Brønsted-Lowry bases in the following equation: CH3NH2(aq) + H2O(l) ⇌ CH3NH3+(aq) + OH−(aq)

Correct AnswerverifiedShow Answer

List the species present in order of increasing concentration in a 0.1 M solution of H2S.

Correct AnswerverifiedShow Answer

Which of the following equations represents the behavior of H2PO4- as an acid?

Correct AnswerverifiedShow Answer

Calculate the pH of a solution that has [H3O+] = 5.2 × 10-7 M.

Correct AnswerverifiedShow Answer

The substance NH3(aq) is

Correct AnswerverifiedShow Answer

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH₃

Correct Answer
verified

Calculate the pH of a solution that has [OH^-] = 3.1 × 10^-8 M.

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
To determine whether the pH of a 0.010 M...
View Answer

When the following reaction goes in the reverse direction (from products to reactants) , what is the acid? HCN(aq) + H₂O(l) ⇌ CN⁻ (aq) + H₃O⁺(aq)

Correct Answer
verified

If the pOH of a coffee sample is 8.85, what is the H₃O⁺ concentration in the coffee?

Correct Answer
verified

The K_a for acetic acid is 1.8 × 10^-5. Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

Correct Answer
verified

Correct Answer
verified

The H₃O⁺ concentration in a 0.050 M solution of HClO₄ is 0.050 M.

Correct Answer
verified

The image shows a molecular-level representation of part of a solution after HF is dissolved in water. (Besides water, there are 6 HF molecules, 1 H₃O⁺ ion, and 1 F⁻ ion present in the solution.) Which of the following best describes HF?

Correct Answer
verified

The symbol In^- can be used to represent the base form of an indicator.

Correct Answer
verified

When the following reaction goes in the reverse direction (from products to reactants) , what is the base? HF(aq) + H₂O(l) ⇌ F⁻(aq) + H₃O⁺(aq)

Correct Answer
verified

Select the two Brønsted-Lowry bases in the following equation: CH₃NH₂(aq) + H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH⁻(aq)

Correct Answer
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List the species present in order of increasing concentration in a 0.1 M solution of H₂S.

Correct Answer
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Which of the following equations represents the behavior of H₂PO₄^- as an acid?

Correct Answer
verified

Calculate the pH of a solution that has [H₃O⁺] = 5.2 × 10^-7 M.

Correct Answer
verified

The substance NH₃(aq) is

Correct Answer
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