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DC CHEM UNIT 9 - ACIDS / BASES

Total questions: 60

Worksheet time: 2hrs 31mins

Name
Class
Date
1.

What is an Arrhenius acid?

a)

A substance that produces H+ in water.

b)

A substance that produces OH- in water.

2.

What is an Arrhenius base?

a)

A substance that produces H+ ion in water

b)

A substance that produces OH- ion in water.

c)

A substance that produces OH+ ion in water

d)

A substance that produces H- ion in water.

3.

A student tests an unknown aqueous solution and finds it conducts electricity and turns litmus paper red. What can the student infer?

a)

The solution contains an acid.

b)

The solution contains a base.

c)

The solutions is neutral.

4.

A student tests an unknown aqueous solution and finds it conducts electricity and turns litmus paper blue. What can the student infer?

a)

The solution contains an acid.

b)

The solution contains a base.

c)

The solutions is neutral.

5.

​ (a)   conduct electricity and turn litmus paper red.

Choose from the below words
Acids
Bases
Neutral solutions
Salts
6.

Label the acid, base, conjugate acid and conjugate base.

a)acid
b)base
c)conjugate acid
d)conjugate base
1
2
3
4
1)
2)
3)
4)
7.

Click on the acid.

A
B
C
D
8.

Click on the base.

A
B
C
D
9.

Click on the conjugate base.

A
B
C
D
10.

Click on the conjugate acid.

A
B
C
D
11.

Which of the following is a Bronsted-Lowry Conjugate acid-base pair.

a)

HCl and NaOH

b)

H3O+ and OH-

c)

H2SO4 and HSO4-

d)

H2S and S2-

12.

According to Bronsted-Lowry, what does an acid do?

a)

It donates a proton (H+).

b)

It accepts a proton (H+)

c)

It produces H+ in water.

d)

It produces OH- in water.

13.

According to Bronsted-Lowry, what does a base do?

a)

It donates a proton (H+).

b)

It accepts a proton (H+)

c)

It produces H+ in water.

d)

It produces OH- in water.

14.

What is the name of HCl?

a)

hydrochloric acid

b)

chloric acid

c)

hypochloric acid

d)

chlorous acid

15.

For a solution, pH + pOH =

a)

7

b)

14

c)

1.0 x 10-14

d)

-log (1.0 x 10 -14)

16.

The pH of a solution is 8.43. What is the [H3O+]concentration?

a)

3.7 x 10 -9

b)

1.0 x 10-8.43

c)

2.7 x 10-6

d)

1.0 x 10-14

17.

If the pH of a solution is 8 the [H3O+] is

a)

1.0 x 106 M

b)

8.0 x 101 M

c)

1.0 x 108 M

d)

1.0 x 10-8 M

18.

Find the pH of a solution with [OH-] = 8.41 x 10-4.

a)

3.08

b)

10.92

c)

9.88

d)

11.23

19.

What is the pOH of a solution with [H+] = 1.24 x 10 -2?

a)

1.91

b)

1.61

c)

12.09

d)

12.39

20.

What is the [OH-] if the [H+] is 1.0 x 10-3M?

a)

1.0 x 10-3 M

b)

1.0 x 10-14 M

c)

6.02 x 10-23 M

d)

1.0 x 10-11 M

21.

A solution has a pH of 6.9. This solution is _____.

a)

an acid

b)

a base

c)

neutral

22.
Limes have a [H3O+] of 1.3 x 10-2 mol/L.  Their pOH is
a)
1.89
b)
12.11
c)
1.03
d)
12.97
23.
The [H+] is orange juice is
0.00020 M.  FInd the pH of orange juice.
a)
1
b)
3.7
c)
10.3
d)
13
24.
What is the [H+] if the pH is 4.0?
a)
1.0 x 10-10  M
b)
1.0 x 10-4  M
c)
1.0 x 10-14  M
d)
1.0 x 10-7  M
25.
What is the pOH of a solution that has a pH of 2?
a)
10
b)
12
c)
14
d)
1
26.
If the [OH-] of a solution is 2.7 x 10-4 mol/L the pOH of the solution is
a)
10.44
b)
3.56
c)
1.00
d)
-4.43
27.

What is the pOH of a solution where the [OH-] = 7.3 x 10-2 M?

a)

-1.14

b)

2.0

c)

1.14

d)

7.3

28.
Which particle contributes the negative charge to the atom?
a)
proton
b)
electron
c)
neutron
d)
nucleus
29.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
30.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
31.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
32.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
33.
A  pH and a pOH will add up to:
a)
0
b)
7
c)
14
d)
1.0 x 10-14
34.
A pH of 14 is a .....
a)
strong acid
b)
weak acid
c)
Strong base
d)
Weak base
35.

What is the pH of a solution that has a [H+] of 2.5 x 10-5?

a)

4.60

b)

5.0

c)

2.5

d)

7

36.

What is the [H+] if the pH is 4.0?

a)

1.0 x 10-10 M

b)

1.0 x 10-4 M

c)

1.0 x 10-14 M

d)

1.0 x 10-7 M

37.
What is the pOH of a solution that has a pH of 2?
a)
10
b)
12
c)
14
d)
1
38.

What is the [H+] in a solution with a pH of 11?

a)

1 x 10-1 M

b)

1 x 10-2 M

c)

1 x 1011 M

d)

1 x 10-11 M

39.

What is the pOH of a solution that has a pH of 13?

a)

10

b)

12

c)

14

d)

1

40.

What is the pH of a solution that has a [H+] of 2.5 x 10-5?

a)

4.60

b)

5.0

c)

2.5

d)

7

41.
If the pH of a solution is 5.6 the pOH is
a)
6.5
b)
12.4
c)
8.4
d)
5.6
42.

What is the [OH-] if the pH is 4.9?

a)

7.94 x 10-10 M

b)

1.0 x 10-4 M

c)

7.94 x 10-14 M

d)

4.9 x 10-10 M

43.
What is the molarity of 3 mole of hydrochloic acid in 3 L of water. 
a)
3
b)
1
c)
6
d)
9
44.

How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?

125mL=.125 L

a)

1074 mol

b)

0.069 mol

c)

1.07 mol

d)

62.7 mol

45.
How many moles are needed to make 2.5 L of a 3.8 M solution? 
a)
9.5 mol
b)
0.66 mol
c)
1.5 mol
d)
15 mol
46.
A neutralization reaction will (almost) always produce...
a)
water & salt
b)
water
c)
salt
d)
water & carbon
47.

A type of chemical that forms solutions that taste sour, due to high concentrations of positive hydrogen ions

a)

acid

b)

base

c)

salt

d)

pH

48.

What is considered to be in the middle of the pH scale

a)

acidic

b)

neutral

c)

basic

d)

indicator

49.
Identify the salt in the following equation:
Zn(OH)2 + HNO3   ---> H2O  + Zn(NO3)2
a)
Zn(OH)2
b)
HNO3
c)
H2O
d)
Zn(NO3)2
50.
In a ____ reaction, an acid and a base produce a salt and a water. 
a)
concentrated
b)
decomposition
c)
dilute
d)
neutralization
51.

Complete the following reaction:

HCl + Mg(OH)2 -->

a)

MgCl2 + H2O

b)

Mg +H2O

c)

MgCl2 + H2

d)

MgCl2 + H2O + CO2

52.

Complete the following reaction:

H3PO4 + NaOH -->

a)

Na3PO4 + H2O

b)

Na +H2O

c)

Na3PO4 + H2

d)

Na3PO4 + H2O + CO2

53.

Complete the following reaction:

HNO3 + Ca(OH)2 -->

a)

Ca(NO3)2 + H2O

b)

Ca +H2O

c)

Ca(NO3)2 + H2

d)

Ca(NO3)2 + H2O + CO2

54.
What type of reaction is displayed below?
HCl + NaOH → NaCl + H2O
a)
Neutralization
b)
Combustion
c)
Double Replacement
d)
Decomposition
55.
In a neutralization reaction, what are the products of a reaction between an acid and a base?
a)
Another acid and base
b)
Carbon dioxide and a salt
c)
Water and a salt
d)
Either two acids or two bases
56.
What is the range of pH values in an acidic solution?
a)
0-7
b)
7-14
c)
15-239058204958
d)
pH = 7
57.
What is the range of pH values in a basic solution?
a)
0-7
b)
7-14
c)
7
58.
The products of a neutralization reaction are acids and bases
a)
True
b)
False
59.
The reactants of a neutralization reaction are acids and bases
a)
True
b)
False
60.
Forms hydroxide ions (OH-) in water
a)
Acids
b)
Bases
c)
All

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