Answers2026-2027_MDCPS_2003345_Chemistry_1_B-CRLab: Measuring pH

Equilibria of Acids and Bases Answers

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How does the value of and compare with the concentrations of hydronium ion and hydroxide ion?

Question illustration
A
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Option A
B
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Option B
C
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Option C
D
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Option D
2
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Which of these refers to the concentration of an acid?

A
a compound that accepts protons
B
an acid that does not dissociate completely when placed in water
C
an intrinsic characteristic of a particular acid related to its dissociation constant
D
a measure of quantity of acid dissolved in water that is designated by molarity
3

Which of these accurately describes why an acid is strong?

A
An acid is strong when it undergoes a reverse reaction.
B
An acid becomes strong when it is mixed with a base.
C
An acid’s strength is due to the amount present in a solution.
D
An acid is strong when it dissociates completely in water.
4

Which statement correctly describes the Ka of a weak acid?

A
The Ka is large, and the equilibrium favors products.
B
The Ka is large, and the equilibrium favors reactants.
C
The Ka is small, and the equilibrium favors products.
D
The Ka is small, and the equilibrium favors reactants.
5

If the base-dissociation constant, Kb, for a substance is 4.3 10–10, what does this tell you about Ka?Use .

Question illustration
A
Ka = 2.3 10–5
Option A
B
Ka = 1.0 10–4
Option B
C
Ka = 2.3 102
Option C
D
Ka = 1.0 103
Option D
6

If hydrofluoric acid is a stronger acid than acetic acid, which statement is most likely true?

A
The conjugate acid of hydrofluoric acid is weaker than that of acetic acid.
B
The conjugate acid of hydrofluoric acid is stronger than that of acetic acid.
C
The conjugate base of hydrofluoric acid is weaker than that of acetic acid.
D
The conjugate base of hydrofluoric acid is stronger than that of acetic acid.
7

An acid has a molarity of 0.01 M. What does the 0.01 M refer to?

A
the strength of the acid
B
the concentration of the acid
C
the amount of base present in the acid
D
the amount of base needed to neutralize the acid
8

Which statement best relates the strength and concentration of a base?

A
At high enough concentrations, a weak base becomes strong.
B
Even at low concentrations, a strong base is strong.
C
A weak base always has a low concentration.
D
The stronger the base, the higher its concentration.
9

The Ka of an acid is 1.3 10–7. Based on the Ka and its relationship with Kw, what is the value of Kb?Use .

Question illustration
A
1.3 10–21
Option A
B
7.7 10–15
Option B
C
1.3 10–14
Option C
D
7.7 10–8
Option D
10

What does it mean for a weak acid to be in equilibrium?

A
The acids only slightly dissociate and readily undergo reverse reaction.
B
The position of equilibrium in weak acids lies more to the right than to the left.
C
At equilibrium there is a small amount of HA and more and .
Option C
D
At equilibrium there is the same amount of HA, and .
Option D

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