Free Printable 11 Acids and Bases Review

1.

Which of the following best defines an acid according to the Arrhenius definition?

a)

A substance that increases the concentration of hydroxide ions in water

b)

A substance that increases the concentration of hydrogen ions in water

c)

A substance that donates electron pairs

d)

A substance that accepts protons

2.

What is the pH of a neutral solution at 25°C?

a)

0

b)

7

c)

14

d)

1

3.

What is the formula to calculate pH from the hydrogen ion concentration $[H^+]$ ?

a)

$pH = -\log[OH^-]$

b)

$pH = -\log[H^+]$

c)

$pH = \log[H^+]$

d)

$pH = -\log[H_2O]$

4.

If the pOH of a solution is 3, what is its pH at 25°C?

a)

3

b)

7

c)

11

d)

14

5.

A solution has a hydrogen ion concentration of $1 \times 10^{-4}$ M. What is its pH?

a)

4

b)

10

c)

7

d)

14

6.

Which of the following solutions is the most basic?

a)

pH = 2

b)

pH = 7

c)

pH = 9

d)

pH = 13

7.

If a solution has a pH of 5, what is its $[H^+]$ concentration?

a)

$1 \times 10^{-5}$ M

b)

$1 \times 10^{-7}$ M

c)

$1 \times 10^{-9}$ M

d)

$1 \times 10^{-3}$ M

8.

A solution has a hydroxide ion concentration of $1 \times 10^{-2}$ M. What is its pOH?

a)

2

b)

4

c)

12

d)

14

9.

If the pH of a solution is 8, what is its pOH at 25°C?

a)

6

b)

7

c)

8

d)

14

10.

Which of the following is the correct relationship between pH and pOH at 25°C?

a)

$pH + pOH = 10$

b)

$pH + pOH = 7$

c)

$pH + pOH = 14$

d)

$pH + pOH = 1$

11.

A student mixes equal volumes of a strong acid (pH = 1) and a strong base (pH = 13). What is the expected pH of the resulting solution?

a)

1

b)

7

c)

13

d)

14

12.

A solution has a pH of 3. Is it acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

d)

Cannot be determined

13.

If a solution has a pOH of 5, what is the hydroxide ion concentration $[OH^-]$ ?

a)

$1 \times 10^{-5}$ M

b)

$1 \times 10^{-9}$ M

c)

$1 \times 10^{-7}$ M

d)

$1 \times 10^{-3}$ M

14.

A student finds that a solution has a pH of 12. What can you infer about the $[H^+]$ and $[OH^-]$ concentrations?

a)

$[H^+]$ is high, $[OH^-]$ is low

b)

$[H^+]$ is low, $[OH^-]$ is high

c)

Both are high

d)

Both are low

15.

A solution has a pH of 2. Calculate its pOH at 25°C.

a)

2

b)

7

c)

12

d)

14

16.

A laboratory solution has a $[OH^-]$ of $1 \times 10^{-8}$ M. What is its pH at 25°C?

a)

6

b)

7

c)

8

d)

14

17.

A student adds a small amount of strong acid to a solution with pH 7. Predict what will happen to the pH.

a)

It will increase

b)

It will decrease

c)

It will stay the same

d)

It will become 14

18.

A student researched some of the properties of H₂CO₃. Based on the properties described, what type of chemical is H₂CO₃?

a)

Acid

b)

Base

c)

Salt

d)

Polyatomic ion

19.

The picture below shows the relative concentrations of H+ and OH- in a solution. Is the solution an acid or a base?

a)

acid

b)

base

20.

The table shows the pH of several solutions. Which solution has the greatest concentration (amount) of OH^- ions?

a)

vinegar

b)

milk

c)

water

d)

bleach

21.

The picture shows the relative concentrations of H3O+ and OH- in a solution.

Is the solution an acid or a base?

a)

acid

b)

base

22.

Which of the following values would represent the pH of a strong base?

a)

1

b)

8

c)

7

d)

13

23.

Acids which dissociate almost completely in aqueous solutions are known as:

a)

Dilute acids

b)

Strong acids

c)

Weak acids

d)

Concentrated acids

24.

If a solution is basic which ion will be more present?

a)

H+

b)

K+

c)

OH-

d)

H-

25.

This ion is responsible for the properties of acids

a)

Sodium ion

b)

Hydrogen ion

c)

Hydroxide ion

d)

Oxide ion

26.

A substance that does not dissociate completely. Ranges from 4-7 on the pH scale.

a)

Strong Acid

b)

Strong Base

c)

Weak Acid

d)

Weak Base

27.

When comparing a strong and weak acid of the same concentration, the strong acid will have...(choose 2 answers)

a)

A higher conductivity

b)

A lower conductivity

c)

A faster rate of reaction

d)

A slower rate of reaction

11 Acids and Bases Review

Total questions: 27

Worksheet time: 41mins

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