Question 1

The compound HA is an acid that is soluble in water. Which of the "beakers" below shows HA behaving as a strong acid in water?

Accepted Answer

A)   
B)   
C)   
D)   E) B) and D)
F) B) and C)

Question 2

Identify each of the substances as an electrolyte or non-electrolyte.
-pure water

Accepted Answer

A)  non-electrolyte
B)  electrolyteC) A) and B)
D) undefined

Question 3

Identify each [H?O+] / [OH-] / pH / pOH  as acidic or basic.
-[H?O+] = 1.2 × 10-9

Accepted Answer

A)  Basic
B)  AcidicC) A) and B)
D) undefined

Question 4

In a solution of a strong monoprotic acid in water, the hydrogen-ion concentration is approximately equal to the molarity of the acid.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following acids is a triprotic acid when dissolved in water?

Accepted Answer

A)   hydrobromic acid
B)   sulfuric acid
C)   hypochlorous acid
D)   phosphoric acidE) B) and C)
F) All of the above

Question 6

"Buffered" solutions are resistant to pH changes, even when small amounts of strong acid or base are added to them.

Accepted Answer

A) True 
 B)False

Question 7

Identify each [H?O+] / [OH-] / pH / pOH  as acidic or basic.
-[OH-] = 1.2 × 10-4

Accepted Answer

A)  Basic
B)  AcidicC) A) and B)
D) undefined

Question 8

Match each of the acids with the maximum number of H?O+ produced per molecule of acid.
-nitric acid

Accepted Answer

A)  3
B)  1
C)  2D) All of the above
E) B) and C)

Question 9

The conjugate base of HCO₃- is ________.

Accepted Answer

A)   H₂CO₃
B)   CO₃2-
C)   CO₂2-
D)   H₃CO₃+E) All of the above
F) A) and C)

Question 10

Which solution is the most acidic solution?

Accepted Answer

A)   a solution whose [H+] = 10-1
B)   a solution whose [OH-] = 10-10
C)   a solution whose pH = 0
D)   All of the above have the same degree of acidity.E) A) and C)
F) All of the above

Question 11

Identify the household products as acidic or basic.
-Milk

Accepted Answer

A)  Acidic
B)  BasicC) A) and B)
D) undefined

Question 12

Which of the following acids does not produce more than one H₃O+ ion per molecule of acid when dissociated in water?

Accepted Answer

A)   carbonic acid
B)   sulfurous acid
C)   phosphoric acid
D)   acetic acidE) A) and B)
F) None of the above

Question 13

Identify each of the acids as a strong acid or a weak acid.
-carbonic acid

Accepted Answer

A)  weak acid
B)  strong acidC) A) and B)
D) undefined

Question 14

Which of the following acids is a strong acid?

Accepted Answer

A)   acetic acid
B)   hydrofluoric acid
C)   phosphoric acid
D)   hydrochloric acidE) All of the above
F) B) and C)

Question 15

Identify each of the acids as a strong acid or a weak acid.
-hypochlorous acid

Accepted Answer

A)  weak acid
B)  strong acidC) A) and B)
D) undefined

Question 16

A change in pH from 10 to 7 ________.

Accepted Answer

A)   increases the acidity 1000×
B)   reduces the acidity 3000×
C)   increases the acidity 3×
D)   increases the acidity 3000×E) C) and D)
F) A) and D)

Question 17

Identify the household products as acidic or basic.
-Natural rainwater

Accepted Answer

A)  Acidic
B)  BasicC) A) and B)
D) undefined

Question 18

An aqueous solution of pOH 5 is more basic than an aqueous solution of pOH 8.

Accepted Answer

A) True 
 B)False

Question 19

When hydrofluoric acid is dissolved in water, the ionized species are ________.

Accepted Answer

A)   H₃O+ and OH-
B)   H₂F- and H₃O+
C)   H₃O+ and F-
D)   H₂F+ and OH-E) None of the above
F) B) and D)

Question 20

What is the hydroxide-ion concentration of an aqueous solution having a hydrogen-ion concentration of 4.75 × 10-5 mol/L?

Accepted Answer

A)   2.10 ×  10-10 mol/L
B)   5.25 × 10-10 mol/L
C)   4.75 × 10-5  mol/L
D)   -4.75 × 10-5 mol/LE) B) and C)
F) A) and D)

Exam 15: Electrolytes, Acids, and Bases

Which of the following acids does not produce more than one H₃O+ ion per molecule of acid when dissociated in water?

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An aqueous solution of pOH 5 is more basic than an aqueous solution of pOH 8.

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Which solution is the most acidic solution?

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Identify each of the substances as an electrolyte or non-electrolyte. -pure water

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Identify the household products as acidic or basic. -Natural rainwater

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What is the hydroxide-ion concentration of an aqueous solution having a hydrogen-ion concentration of 4.75 × 10-5 mol/L?

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The conjugate base of HCO₃- is ________.

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Which of the following acids is a strong acid?

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When hydrofluoric acid is dissolved in water, the ionized species are ________.

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The compound HA is an acid that is soluble in water. Which of the "beakers" below shows HA behaving as a strong acid in water?

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Identify each [H?O+] / [OH-] / pH / pOH as acidic or basic. -[OH-] = 1.2 × 10-4

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Identify the household products as acidic or basic. -Milk

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A change in pH from 10 to 7 ________.

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Match each of the acids with the maximum number of H?O+ produced per molecule of acid. -nitric acid

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"Buffered" solutions are resistant to pH changes, even when small amounts of strong acid or base are added to them.

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In a solution of a strong monoprotic acid in water, the hydrogen-ion concentration is approximately equal to the molarity of the acid.

Correct AnswerverifiedShow Answer

Identify each [H?O+] / [OH-] / pH / pOH as acidic or basic. -[H?O+] = 1.2 × 10-9

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Identify each of the acids as a strong acid or a weak acid. -hypochlorous acid

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Which of the following acids is a triprotic acid when dissolved in water?

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Identify each of the acids as a strong acid or a weak acid. -carbonic acid

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What is the hydroxide-ion concentration of an aqueous solution having a hydrogen-ion concentration of 4.75 × 10^-5 mol/L?

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Identify each [H?O+] / [OH-] / pH / pOH as acidic or basic. -[OH-] = 1.2 × 10^-4

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Identify each [H?O+] / [OH-] / pH / pOH as acidic or basic. -[H?O+] = 1.2 × 10^-9

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