Question 1

What is the pH of a solution that has a hydronium ion concentration of 3.98 x 10-9 M?

Accepted Answer

A)   5.600
B)   8.400
C)   9.000
D)   3.980E) A) and B)
F) A) and D)

Question 2

Which of the following statements about weak acids is correct?

Accepted Answer

A)   Weak acids always contain C atoms.
B)   The percentage dissociation for weak acids is usually in the range 40-60%.
C)   Weak acids can only be prepared as dilute solutions.
D)   Weak acid molecules have a strong affinity for acidic hydrogens.E) None of the above
F) A) and B)

Question 3

Identify the acid (A), base (B), conjugate acid (CA) and conjugate base (CB) in each of the following reactions:
A) HSO4-(aq) + ClO-(aq) → HClO (aq) + SO4-2 (aq)
B) H2C2O4 (aq) + NH3 (aq) → HC2O4- (aq) + NH4+

Accepted Answer

A) in order: A, B, C...

Question 4

Which of the following does not describe an acidic solution?

Accepted Answer

A)   The pH is less than 7.
B)   The [OH-] is 1 x 10-4 M.
C)   The [OH-] is less than the [H3O+].
D)   The [OH-] is 6.0 x 10-10 M.E) A) and D)
F) A) and C)

Question 5

Which of the following compounds will not hydrolyze?

Accepted Answer

A)   HF
B)   H2S
C)   NaC2H3O2
D)   HClE) C) and D)
F) B) and D)

Question 6

If the pH of a solution has decreased from 5.0 to 4.0, the [H3O+] ________.

Accepted Answer

A)   increases by a factor of 1
B)   increases by a factor of 10
C)   decreases by a factor of 1
D)   decreases by a factor of 100E) B) and C)
F) A) and D)

Question 7

The pH of a solution for which [OH-] = 1.0 x 10-9 is ________.

Accepted Answer

A)   1.00
B)   5.00
C)   9.00
D)   -5.00E) None of the above
F) A) and B)

Question 8

In the reaction below, identify the conjugate acid-base pair. (The acid is listed first in the pair.) 
H2PO4? + S2-  →\rightarrow→  HS- + HPO42-

Accepted Answer

A)   S-2  &ensp; HS-
B)   H2PO4- &ensp; S-2
C)   H2PO4- &ensp; HPO4-2
D)   HS- &ensp; H2PO4- E) None of the above
F) B) and C)

Question 9

The pH of a solution for which [H3O+] = 8.3 x 10-9 is ________.

Accepted Answer

A)   5.92
B)   9.60
C)   8.08
D)   6.00E) A) and D)
F) B) and D)

Question 10

Which of the following statements about the reaction of acids with metals is incorrect?

Accepted Answer

A)   Acids react with many, but not all, metals.
B)   Any metal below hydrogen in the activity series will dissolve in a non-oxidizing acid.
C)   Hydrogen gas is produced when a metal dissolves in acid.
D)   Metal atoms which dissolve in acid become positive metal ions.E) B) and D)
F) B) and C)

Question 11

Which of the following pairs of compounds and classifications is incorrectly matched?

Accepted Answer

A)   HI &ensp; strong acid
B)   NH3 &ensp; weak base
C)   LiC2H3O2 &ensp; salt
D)   Ca(OH) 2 &ensp; weak baseE) A) and C)
F) A) and B)

Question 12

Which of the following statements about acids and bases is incorrect?

Accepted Answer

A)   All Arrhenius acids are Bronsted-Lowry acids.
B)   Arrhenius acid-base definitions are based on water as the solvent.
C)   All Bronsted-Lowry bases are Arrhenius bases.
D)   Bronsted-Lowry acid-base definitions are independent of solvent identity.E) A) and D)
F) A) and C)

Question 13

A solution has a pH = 3.0. What is the pH of a solution that is 100 times more basic?

Accepted Answer

A)   1.0
B)   3.0
C)   5.0
D)   13.0E) A) and B)
F) A) and C)

Question 14

Which of the following is not a conjugate acid/base pair?

Accepted Answer

A)   PH4+/PH3
B)   H2O/OH-
C)   HSO4-/SO42-
D)   S2-/H2SE) None of the above
F) All of the above

Question 15

In a basic solution:

Accepted Answer

A)   [H3O+] = [OH-]
B)   [H3O+] > [OH-]
C)   [H3O+] -]
D)   [H3O+] = 0 ME) All of the above
F) C) and D)

Question 16

Write the balanced net ionic equation for the following acid-base reaction using the simplest whole number ratio of coefficients.
H3PO4 (aq) + 3 LiOH (aq) → 3 H2O (l) + Li3PO4 (aq)

Accepted Answer

H₃PO₄ + 3 OH...

Question 17

If the pH of a solution of a salt is 10.5, the salt must be one which could be formed from the neutralization of ________.

Accepted Answer

A)   a strong acid and a strong base
B)   a weak acid and a strong base
C)   a strong acid and a weak base
D)   HCl and NaOHE) None of the above
F) C) and D)

Question 18

What is the concentration of a nitric acid solution if a 10.00 mL sample of the acid requires 31.25 mL of a 0.135 M KOH to neutralize it?

Accepted Answer

A)   0.0432 M
B)   0.422 M
C)   0.844 M
D)   0.135 ME) A) and D)
F) All of the above

Question 19

Which of the following pairs of acids and conjugate bases is incorrectly labeled?

Accepted Answer

A)   HSO4- &ensp; &ensp; SO4-2
B)   HFO2 &ensp; &ensp; HFO3
C)   HSO3- &ensp; &ensp; SO3-2
D)   NH4+ NH3E) B) and C)
F) B) and D)

Question 20

How many mL of a 0.100 M NaOH solution is needed to neutralize 50.00 mL of a 0.150 M solution of HC2H3O2?

Accepted Answer

A)   25.0 mL
B)   37.5 mL
C)   75.0 mL
D)   100. mLE) B) and C)
F) A) and D)

Exam 14: Acids, Bases and Salts

A solution has a pH = 3.0. What is the pH of a solution that is 100 times more basic?

Correct AnswerverifiedShow Answer

Which of the following statements about the reaction of acids with metals is incorrect?

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What is the concentration of a nitric acid solution if a 10.00 mL sample of the acid requires 31.25 mL of a 0.135 M KOH to neutralize it?

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How many mL of a 0.100 M NaOH solution is needed to neutralize 50.00 mL of a 0.150 M solution of HC2H3O2?

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Which of the following compounds will not hydrolyze?

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In the reaction below, identify the conjugate acid-base pair. (The acid is listed first in the pair.) H2PO4? + S2- →\rightarrow→ HS- + HPO42-

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Which of the following is not a conjugate acid/base pair?

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Identify the acid (A), base (B), conjugate acid (CA) and conjugate base (CB) in each of the following reactions: A) HSO4-(aq) + ClO-(aq) → HClO (aq) + SO4-2 (aq) B) H2C2O4 (aq) + NH3 (aq) → HC2O4- (aq) + NH4+

Correct AnswerverifiedA) in order: A, B, C...View AnswerShow Answer

Which of the following does not describe an acidic solution?

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Which of the following statements about weak acids is correct?

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Which of the following pairs of acids and conjugate bases is incorrectly labeled?

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In a basic solution:

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If the pH of a solution of a salt is 10.5, the salt must be one which could be formed from the neutralization of ________.

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The pH of a solution for which [OH-] = 1.0 x 10-9 is ________.

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The pH of a solution for which [H3O+] = 8.3 x 10-9 is ________.

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What is the pH of a solution that has a hydronium ion concentration of 3.98 x 10-9 M?

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Write the balanced net ionic equation for the following acid-base reaction using the simplest whole number ratio of coefficients. H3PO4 (aq) + 3 LiOH (aq) → 3 H2O (l) + Li3PO4 (aq)

Correct AnswerverifiedH3PO4 + 3 OH...View AnswerShow Answer

Which of the following statements about acids and bases is incorrect?

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If the pH of a solution has decreased from 5.0 to 4.0, the [H3O+] ________.

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Which of the following pairs of compounds and classifications is incorrectly matched?

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How many mL of a 0.100 M NaOH solution is needed to neutralize 50.00 mL of a 0.150 M solution of HC₂H₃O₂?

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In the reaction below, identify the conjugate acid-base pair. (The acid is listed first in the pair.) H₂PO₄^? + S^2- $\rightarrow$ HS^- + HPO₄^2-

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Identify the acid (A), base (B), conjugate acid (CA) and conjugate base (CB) in each of the following reactions: A) HSO₄^-(aq) + ClO^-(aq) → HClO (aq) + SO₄^-2 (aq) B) H₂C₂O₄ (aq) + NH₃ (aq) → HC₂O₄^- (aq) + NH₄⁺

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A) in order: A, B, C...
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The pH of a solution for which [OH^-] = 1.0 x 10^-9 is ________.

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The pH of a solution for which [H₃O⁺] = 8.3 x 10^-9 is ________.

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What is the pH of a solution that has a hydronium ion concentration of 3.98 x 10^-9 M?

Correct Answer
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Write the balanced net ionic equation for the following acid-base reaction using the simplest whole number ratio of coefficients. H₃PO₄(aq) + 3 LiOH (aq) → 3 H₂O (l) + Li₃PO₄(aq)

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H₃PO₄ + 3 OH...
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If the pH of a solution has decreased from 5.0 to 4.0, the [H₃O⁺] ________.

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Correct Answer
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