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AP Chemistry--Acid Base Equilibria

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.
A chemist is working with a liquid substance that tastes bitter, feels slippery, and conducts an electric current. Which of the following is the chemist most likely working with? 
a)
a salt
b)
a base
c)
an acid
d)
distilled water
2.

Which of these is a weak base?

a)

NH3

b)

KOH

c)

HCOOH

d)

HBr

3.

Which of these is a strong acid?

a)

NH3

b)

CH3COOH

c)

HClO3

d)

HF

4.

Which of the following describes H2SO4

a)

Weak acid

b)

Strong base

c)

Strong acid

d)

Weak base

5.
I have a pOH have 4.23. Am I acidic or basic?
a)
Acidic
b)
Basic
c)
Neutral
6.

A solution contains 0.04 M of a weak acid. Calculate the pH of the solution knowing that the Ka for the acid is 1.6 x 10-7

a)

It is not possible to solve if the identity of the acid is not known

b)

4.1

c)

4.9

d)

Because the Ka is very small, the pH is close to neutral (about 6)

7.
Which of the following is an example of an acid anhydride.
a)
MgO
b)
Na2O
c)
CO2
d)
CaO
8.
WHen 200 mL of 2.0 M NaOH(aq) is added to 500 mL of 1.0 M HCl(aq), the pH of the resulting mixture is closest to 
a)
1.0
b)
3.0
c)
7.0
d)
13.0
9.
What is the pOH of a solution that has a pH of 2?
a)
10
b)
12
c)
14
d)
1
10.

Which chemical is a proton acceptor?

a)

Acid

b)

Base

11.

What is the pH of a 0.053 M solution of potassium hydroxide

a)

6.91

b)

12.72

c)

7.33

d)

1.28

12.

Of the following, which is the strongest acid

a)

HClO

b)

HClO2

c)

HClO3

d)

HClO4

13.

What is the conjugate acid of CO3-2?

a)

CO2-2

b)

HCO22-2

c)

H2CO3

d)

HCO3-1

14.
A compound that donates H+ ions is 
a)
A Bronsted-Lowry Acid
b)
An Arrhenius Acid
c)
A Bronsted-Lowry Base
d)
An Arrhenius Base
15.
Forms a OH- hydroxide ion
a)
Lewis Base
b)
Arrhenius Base
c)
Bronsted Lowry Base
d)
Bronsted Lowry Acid
16.

Water can act as both an acid and a base in an ionization reaction to form H+ and OH– ions. What is this phenomenon called?

a)

neutralization

b)

self-ionization

c)

base dissociation

d)

acid dissociation

17.

Hydrochloric acid (HCl) and acetic acid (HC2H3O2) are both acids. HCl completely dissociates in water, while HC2H3O2 does not. Which of the following statements best describes these two acids?

a)

HCl is a weak acid, HC2H3O2 is a weak acid.

b)

HCl is a strong acid, HC2H3O2 is a strong acid.

c)

HCl is a strong acid, HC2H3O2 is a weak acid.

d)

HCl is a weak acid, HC2H3O2 is a strong acid.

18.

Which of the following is a Brønsted-Lowry base but not an Arrhenius base?

a)

Ca(OH)2

b)

NH3

c)

NaOH

d)

KOH

19.
The Kw constant is:
a)
1.0 x 10-14
b)
1.0 x 1014
c)
6.022 x 1023
d)
6.0634 x 10-34
20.
If 25 mL of a Ca(OH)2 solution is needed to neutralize 15 mL of 0.18 M HC2H3O2, what is the concentration of the Ca(OH)2 solution?
a)
0.216 M
b)
0.108 M
c)
0.3 M
d)
0.054 M

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