wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

🧲 pH & pH Scale

Total questions: 74

Worksheet time: 1hrs 14mins

Name
Class
Date
1.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
2.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
3.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
4.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
5.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
6.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
7.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
8.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
9.
Which is most acidic?
a)
Baking Soda
b)
Lemon Juice
c)
Black Coffee
d)
Milk
10.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
11.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
12.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
13.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
14.
Feels slippery.
a)
Acids
b)
Bases
c)
All
15.

Match the following

a)

higher than 7

1.

base

b)

lower than 7

2.

acid

c)

7

3.

neutral

16.

In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about there relationship?

a)

Both of the solution are bases

b)

Both of the solution are acids

c)

The Baking soda is an acid and the Bleach is a base

d)

The baking soda is a base and the Bleach is an acid.

17.

A pH of 3 is how many times more acidic than a pH of 5?

a)

2

b)

20

c)

10

d)

100

18.
On the pH scale higher numbers indicate
a)
acids
b)
bases
19.

Water has a neutral because

a)

it has more H+ ions than OH-

b)

it has more OH- ions than H+

c)

it does not produce any ions

d)

it has an equal amount of H+ and OH- in solution

20.
A solution has a pH of 7.0.  What would happen to the pH if H ions were added?
a)
pH would go up
b)
pH would go down
c)
pH would stay the same
d)
None of these
21.

A chemical has a pH = 6. It would be best described as

a)

Strong acid

b)

Strong base

c)

Weak acid

d)

Weak base

22.

Substances that taste sour like lemon juice tend to be classified as

a)

Acids

b)

Bases

c)

Salts

d)

All

23.

Substances like dark chocolate that have a bitter taste, usually indicates that it would be classified as a

a)

Acids

b)

Bases

c)

Salts

d)

All

24.

What does pH measure?

a)

the amount of hydrogen (H+) ions

b)

the amount of hydroxide (OH-) ions

c)

amount of water

d)

all of the above

25.

A substance that is a base has more OH- ions than H+ ions.

a)

True

b)

False

26.

As one moves down the pH scale from 14 to 1, what happens to the concentration of H+ in the solution?

a)

concentration of H+ decreases

b)

concentration of H+ increases

c)

concentration of H+ stays the same

27.

If pure water is added to an acid with a pH of 3, what happens to the pH of the solution?

a)

the pH increases to above 3

b)

the pH decreases to below 3

c)

the pH stays the same at 3

28.

Match each pH with the correct category:

a)

strong acid

1.

1.0

b)

strong base

2.

13.5

c)

weak acid

3.

5.5

d)

weak base

4.

8.5

e)

neutral

5.

7.0

29.

A solution with a pH of 5 is 1,000 times more acidic than a solution with a pH of

(a)  

30.

A solution with a pH of 6 is 100 times less acidic than a solution with a pH of

(a)  

31.

A pH of 1 is how many times more acidic than pH of 5?

(a)  

32.

A pH of 13 is how many more times more basic than a solution with a pH of 10?

(a)  

33.

Which of the following pH values represent the highest concentration of hydronium ions?

a)

8

b)

4

c)

14

d)

2

34.

Which substance has a higher concentration of hydronium ions, HI or Sr(OH)2?

a)

HI

b)

Sr(OH)2

35.

How does the concentration of hydrogen ions compare to the concentration of hydroxide ions if a solution has a pH of 7?

a)

[H]>[OH]

b)

[OH]>[H]

c)

[H] = [OH]

36.

Which list of pHs are in order of increasing H+ ions?

a)

6 --> 9 --> 12

b)

9 --> 12 --> 6

c)

12 --> 9 --> 6

d)

9 --> 6 --> 12

37.

For a solution, pH + pOH =

a)

7

b)

14

c)

1.0 x 10-14

d)

-log (1.0 x 10 -14)

38.

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

a)

4.0

b)

10.0

c)

1.0 x 10 -4

d)

cannot be determined from the information

39.

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

40.

If the [H3O+] of a solution is 1 x 10-3 M, the pH is

a)

11

b)

-3

c)

3

d)

1

41.

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

42.

If the [OH-] of a solution is 2.7 x 10-4 M, the pOH of the solution is

a)

10.44

b)

1.00

c)

3.57

d)

-4.43

43.

Oranges have a [H3O+] of 1.7 x 10-2 M. Their pOH is

a)

1.77

b)

12.23

c)

10.91

d)

3.09

44.

Ammonia has a pOH of 2. Ammonia is a(n) __________.

a)

acid

b)

base

c)

neutral

d)

metal

45.

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

46.

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

47.

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

48.

If a solution has a very low pH, the hydroxide concentration is _______.

a)

very high

b)

very low

c)

zero

49.

If a solution has a very high pH, the hydroxide concentration is _______.

a)

very high

b)

very low

c)

zero

50.

The table below shows the molar concentrations of

hydronium ion, H3O+, in four different solutions.

Which solution has the highest pH?

a)

A

b)

B

c)

C

d)

D

51.

Which indicator is blue in a solution that has a pH of 5.6?

a)

bromcresol green

b)

bromthymol blue

c)

thymol blue

d)

methyl orange

52.

Based on the results of testing colorless solutions with indicators, which solution is most acidic?

a)

solution where bromthymol blue is blue

b)

solution where bromcresol green is blue

c)

solution where phenolphthalein is pink

d)

solution where methyl orange is red

53.

Which indicator is yellow in a solution with a pH of 9.8?

a)

methyl orange

b)

bromthymol blue

c)

bromcresol green

d)

thymol blue

54.

What is the equation for calculating pH?

a)

pH = [H+]

b)

pH = log [H+]

c)

pH = -log[OH-]

d)

pH = -log [H+]

55.

If a solution has a [H+] of 9.3x10-11, what is the pH?

a)

10.0

b)

4.0

c)

3.5

d)

8.2

56.
Litmus paper is an indicator of acids and bases, it turns red for bases.
a)
True
b)
false
57.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
58.
An indicator will ______________ when it is in contact with an acid or base
a)
Bubble
b)
Form a new substance
c)
Change color
d)
Stay the same color
59.
The pH of a strong acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
60.
The pH of a strong base would be:
a)
1-2
b)
5-6
c)
8-9
d)
13-14
61.
The pH of a weak base would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
62.
The pH of a weak acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
63.
According to the image, the substance tested is a...
a)
Acid
b)
Neutral
c)
Strong Acid
d)
Base
64.
According to the image, the substance tested is a...
a)
Acid
b)
Base
c)
Neutral
d)
Strong Acid
65.
Examine the results (color change) of the pH paper shown in the picture.  What type of substance was tested?
a)
an acid
b)
a base
c)
a neutral substance
d)
none of the above
66.

Which indicator would best show a WEAK base?

a)

Methyl Orange

b)

Thymol Blue

c)

Bromophenol Blue

d)

Alizarin Yellow

67.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
68.

Which solution would turn litmus red?

a)

KOH(aq)

b)

NaCl(aq)

c)

HCl(aq)

d)

NH3(aq)

69.

Which solution would turn litmus blue?

a)

HCl(aq)

b)

CH3COOH(aq)

c)

H2SO3(aq)

d)

NH3(aq)

70.

Phenolphthalein has a pink color in a solution that has a pH of

a)

5

b)

11

c)

1

d)

7

71.

Ammonia is more alkaline (basic) than

a)

Baking Soda

b)

Soap

c)

Bleach

d)

Drain Cleaner

72.

Choose the substance that is more acidic using the scale

a)

Milk

b)

Soap

c)

Coffee

d)

Stomach acid

73.

The advantage of a universal indicator is...

a)

that it has pretty colors

b)

it can give a more accurate measurement of the pH than phenolphtalein

c)

it is a paper

d)

it is universal

74.

The pH scale is an inverse function. This means the ___________ the concentration of hydrogen ions, the ___________ the pH is. (select all that apply)

a)

higher, lower

b)

lower, higher

c)

higher, higher

d)

lower, lower

Similar Resources on Wayground

OT CUOI KY 2 - HOA 12

70 questions

OT CUOI KY 2 - HOA 12

quiz

Worksheet

•

12th Grade

Physical Behavior of Matter

72 questions

Physical Behavior of Matter

quiz

Worksheet

•

9th - 12th Grade

Semester 1 Mid Exam Honors

78 questions

Semester 1 Mid Exam Honors

quiz

Worksheet

•

10th - 11th Grade

(CHEM 1) Mid-year Reveiw

75 questions

(CHEM 1) Mid-year Reveiw

quiz

Worksheet

•

9th - 12th Grade

DMS Chemistry Final

70 questions

DMS Chemistry Final

quiz

Worksheet

•

6th - 10th Grade

Chemistry II Unit 8 Review

74 questions

Chemistry II Unit 8 Review

quiz

Worksheet

•

12th Grade

ôn tập nito và các hợp chất của nito

71 questions

ôn tập nito và các hợp chất của nito

quiz

Worksheet

•

11th Grade