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Acids, Bases, and pH problems

Total questions: 38

Worksheet time: 28mins

Name
Class
Date
1.

Which chemical is a proton (H+) donor?

a)

Acid

b)

Base

2.

Which chemical is a proton (H+) acceptor?

a)

Acid

b)

Base

3.

Which chemical tastes bitter?

a)

Acid

b)

Base

4.

Which chemical tastes sour?

a)

Acid

b)

Base

5.

Which chemical produces a hydrodium ion, H3O+, when mixed with water?

a)

Acid

b)

Base

6.

Which chemical produces a hydroxide ion, OH-,when mixed with water?

a)

Acid

b)

Base

7.

Which chemical feels slippery on the skin?

a)

Acid

b)

Base

8.

Which pH number below reflects a weak acid?

a)

1

b)

6

c)

8

d)

13

9.

Which pH number below reflects a weak base?

a)

1

b)

6

c)

8

d)

13

10.

Which pH number below reflects a strong base?

a)

1

b)

6

c)

8

d)

13

11.

Which pH number below reflects a strong acid?

a)

1

b)

6

c)

8

d)

13

12.

Which of the following substances is basic?

a)

Apple juice

b)

Ginger ale

c)

Baking soda

d)

Distilled water

13.

Which of the following substances is basic?

a)

soda

b)

lemon juice

c)

soap

d)

vinegar

14.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
15.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
16.

Weaker Bases have a pH closer to 7

a)

True

b)

False

17.

According to the pH scale, which item is more acidic than lemons?

a)

battery

b)

vinegar

c)

milk

d)

blood

18.

According to the pH scale, which item is a stronger base than soap?

a)

baking soda

b)

ammonia solution

c)

tomato

d)

bleach

19.

What is the pH of a solution that has a [H+] concentration of 1x10-4 ?

a)

10

b)

4

c)

.0001

d)

7

20.

What is the pH of a solution that has a [OH-] of 1 x 10-5 ?

a)

9

b)

5

c)

.00005

d)

13

21.
What is the pH of a solution if [H+] = 6.0 x 10-10 M?
a)
3.45
b)
6.25
c)
9.22
d)
11.34
22.
Drain cleaner has a pH of 13. What is drain cleaner?
a)
An acid.
b)
A strong base.
c)
Neutral.
d)
A weak base.
23.
Zn(OH)2 is an example of a...
a)
acid
b)
base
c)
salt
24.
H3PO4 is an example of a ...
a)
acid
b)
base
c)
salt
25.

An acidic solution has a  

a)

higher concentration of hydronium ions [H3O+]\left[H_3O^+\right]  than hydroxide ions [OH−]\left[OH^-\right]  

b)

higher concentration of hydroxide ions [OH−]\left[OH^-\right]   than hydronium ions [H3O+]\left[H_3O^+\right]  

c)

equal concentration of hydronium ions [H3O+]\left[H_3O^+\right]   and hydroxide ions [OH−]\left[OH^-\right]  

26.

An basic solution has a  

a)

higher concentration of hydronium ions [H3O+]\left[H_3O^+\right]  than hydroxide ions [OH−]\left[OH^-\right]  

b)

higher concentration of hydroxide ions [OH−]\left[OH^-\right]   than hydronium ions [H3O+]\left[H_3O^+\right]  

c)

equal concentration of hydronium ions [H3O+]\left[H_3O^+\right]   and hydroxide ions [OH−]\left[OH^-\right]  

27.

An neutral solution has a  

a)

higher concentration of hydronium ions [H3O+]\left[H_3O^+\right]  than hydroxide ions [OH−]\left[OH^-\right]  

b)

higher concentration of hydroxide ions [OH−]\left[OH^-\right]   than hydronium ions [H3O+]\left[H_3O^+\right]  

c)

equal concentration of hydronium ions [H3O+]\left[H_3O^+\right]   and hydroxide ions [OH−]\left[OH^-\right]  

28.

Which compound is the conjugate acid? (Hint: Determine the base)

PO43- + HNO3 →\rightarrow   NO3- + HPO42-

a)

PO43-

b)

HNO3

c)

NO3-

d)

HPO42-

29.

In the reaction below, H2O is a(n):

H2SO3 + H2O →\rightarrow   H3O+ + HSO3-

a)

Bronsted-Lowry base

b)

Bronsted-Lowry acid

c)

conjugate acid

d)

conjugate base

30.

HSO4- + H2O → H3O++ SO42-

Identify the Bronsted-Lowry Acid in the above reaction.

a)

HSO4-

b)

H2O

c)

H3O+

d)

SO42-

31.

What is the pOH of a solution with and [OH-] = 4.5 x 10-4?

a)

3.53

b)

3.80

c)

3.35

d)

5.33

32.

For a solution, pH + pOH =

a)

7

b)

1.0 E-14

c)

14

d)

-log (1.0 E-14)

33.

If the pH of a solution is 4.0, what is the pOH?

a)

4.0

b)

1.0 E-4

c)

10

d)

Cannot be determined from the information

34.

CO32-(aq) + H2O(l) → HCO3-(aq)+OH-(aq)

Using the above reaction, which compound is the conjugate base?

a)

CO32-

b)

H2O

c)

HCO3-

d)

OH-

35.

A Lewis acid:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces H3O+

d)

an electron pair acceptor

e)

an electron pair donor

36.

A Lewis base:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces OH-

d)

an electron pair acceptor

e)

an electron pair donor

37.

If the pH changes from 8 to a 10, the solution with the pH of 10 is _ times more basic than the solution with a pH of 8.

a)

2

b)

10

c)

20

d)

100

e)

200

38.

If the pH changes from 6 to 4, the solution with the pH of 4 is _ times more acidic than the solution with a pH of 6.

a)

2

b)

10

c)

20

d)

100

e)

200

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