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Acids & Bases

Total questions: 75

Worksheet time: 2hrs 32mins

Name
Class
Date
1.

A sour taste is a characteristic of:

a)

acids

b)

bases

c)

neutral

d)

pH scale

2.

pH is the measure of the concentration of ______.

a)

Acids

b)

H+ ion

c)

OH- ion

d)

Bases

3.

A substance that is 3 on the pH scale would be a(n):

a)

acid

b)

base

c)

neutral

d)

solute

4.
Which one of the following is an example of a base?
a)
orange juice
b)
dish soap
c)
vinegar
d)
lemons
5.

A substance that changes color when mixed with an acid or base is a(n) ___.

a)

indicator

b)

neutralizer

c)

corrosive

d)

electricity

6.

What color does litmus paper turn in the presence of an acid?

a)

blue

b)

black

c)

green

d)

red

7.
Bases are located where on the pH scale?
a)
any number can be a base
b)
below 7
c)
above 7
d)
number 7 is a base
8.
Bleach and oven cleaner are:
a)
strong acids
b)
weak acids
c)
strong bases
d)
weak bases
9.
A substance that is a 10 on the pH scale would be a(n) ____.
a)
acid
b)
neutral
c)
base
d)
indicator
10.
At what location on the pH scale can you find acids?
a)
number 7 on the pH scale is acidic
b)
below 7
c)
above 7
d)
you can find acids all throughout the scale
11.

The substance that dissolves the solute in a solution is the ____.

a)

solvent

b)

sour

c)

solute

d)

hydrogen ions

12.
Which of the following is neutral?
a)
milk
b)
eggs
c)
gummy worms
d)
pure water
13.

Taste bitter

a)

acids

b)

bases

c)

neutral

d)

pH paper

14.

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

a)

battery

b)

vinegar

c)

milk

d)

blood

15.

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

a)

baking soda

b)

ammonia solution

c)

tomato

d)

bleach

16.

Which of the following statements is true concerning acids and bases?

a)

acids and bases don't react with each other

b)

acids mixed with bases neutralize each other

c)

acids mixed with bases make stronger bases

d)

acids mixed with bases make stronger acids

17.

True or false: bases are sometimes called alkaline.

a)

True

b)

False

18.

Neutral solutions have a pH of:

a)

0

b)

1

c)

7

d)

14

19.

Vinegar, fruit juice, and cola are examples of:

a)

strong acids

b)

strong bases

c)

strong bases

d)

weak acids

20.

Is laundry detergent an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

21.

Ammonia is found in many household products, including window cleaner. What is the pH of ammonia?

a)

It's acidic.

b)

It's basic.

c)

It's neutral.

22.

Is pure water acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

23.

Water found near sources of air pollution tends to be:

a)

Acidic.

b)

Basic.

c)

Neither. Air pollution doesn't alter the pH of water.

24.

Vinegar is an example of:

a)

An acid.

b)

A base.

c)

Neither an acid nor a base.

25.

Tums and Milk of Magnesia are examples of:

a)

Acids

b)

Antacids

c)

Neither acids nor bases.

d)

Both antacids and bases.

26.

Stronger acids have a pH closer to...

a)

7

b)

0

c)

14

d)

9

27.

The pH scale is a range from:

a)

1-7

b)

0-14

c)

1-5

d)

1-14

28.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
29.

What would be considered the weakest base?

a)

3

b)

14

c)

8.2

d)

11.6

30.

What would be considered the strongest base?

a)

8

b)

14

c)

7.8

d)

11.6

31.

Which of the following is the strongest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

32.

Which of the following is the weakest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

33.

Which of the following is the strongest acid?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

34.

Which of the following is the strongest base?

a)

soap - 10

b)

HCL - 0

c)

blood - 7.45

d)

soft drink - 3

35.

Which of the following is the strongest acid?

a)

soap - 10

b)

HCL - 0

c)

blood - 7.45

d)

soft drink - 3

36.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

37.

Which statement is true when acids and bases are mixed together?

a)

acids become stronger

b)

bases become stronger

c)

there is no change

d)

they neutralize each other

38.
Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.
a)
purple
b)
red
c)
blue
d)
pink
39.
turns blue litmus paper red
a)
acid
b)
base
40.
turns red litmus paper blue
a)
base
b)
acid
41.
feels slippery
a)
acid
b)
base
42.
reacts with metals
a)
base
b)
acid
43.
pH below 7
a)
base
b)
acid
44.
pH above 7
a)
acid
b)
base
45.

Can be used to neutralize acids

a)

base

b)

acid

46.
If an acid has a pH of 1.4 will it be strong or weak?
a)
strong
b)
weak
47.
If an acid has a pH of 6.5 will it be strong or weak?
a)
strong
b)
weak
48.
At what pH is a solution neutral?
a)
0
b)
7
c)
14
49.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
50.

This piece of litmus paper has been dipped into:

a)

An acid

b)

A base

c)

A pH-neutral substance

d)

A buffer

51.

What might happen if acidi chemicals were emitted into the air by factories? Choose the best answer.

a)

The acid would destroy metallic elements in the air.

b)

The acid would be neutralized by bases within clouds.

c)

Acid rain might destroy ecosystems and farmland.

52.

Healthy environments for life have a pH closest to:

a)

1

b)

3

c)

7

d)

10

53.

Bleach

a)

Acid

b)

Neutral

c)

Base

54.

Baking soda

a)

Acid

b)

Neutral

c)

Base

55.

Coffee

a)

Acid

b)

Neutral

c)

Base

56.

Detergent

a)

Acid

b)

Neutral

c)

Base

57.

Orange

a)

Acid

b)

Neutral

c)

Base

58.

Toilet cleaner

a)

Acid

b)

Neutral

c)

Base

59.

Tomato

a)

Acid

b)

Neutral

c)

Base

60.

Vinegar

a)

Acid

b)

Neutral

c)

Base

61.

Water

a)

Acid

b)

Neutral

c)

Base

62.

Which is a weaker acid than a tomato?

a)

vinegar

b)

lemon

c)

coffee

63.

Which will turn a red litmus paper to blue?

a)

soap

b)

water

c)

milk

64.

Which is a stronger base than ammonia?

a)

baking soda

b)

bleach

c)

antacids

65.

Healthy blood pH should be between 7.35 to 7.45. It is ______.

a)

strongly acidic

b)

slightly acidic

c)

slightly basic

d)

strongly basic

66.

What occurs when you mix vinegar and baking soda?

a)

neuralizer

b)

neutralization

c)

realization

d)

civilization

67.

Which can be used as first aid to neutralize heartburn and hyperacidity?

a)

bleach

b)

soap

c)

vinegar

d)

antacid

68.

Which of the following is not a cause of acid rain?

a)

volcanic eruptions

b)

burning of fossil fuels

c)

electric cars

d)

combustion engines

69.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
70.

Phenolophalein turns from clear to pink when the pH turns

a)

acidic

b)

basic

c)

saline

d)

ionic

71.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

72.
On the pH scale what numbers are bases?
a)
8-14
b)
0-7
c)
7
d)
1
73.
On the pH scale what numbers are acids?
a)
8-14
b)
0-7
c)
7
d)
1
74.
Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker
a)
is a base.
b)
has a neutral pH.
c)
is an acid.
d)
does not have a pH.
75.
Litmus paper can be used to determine the _______ of a substance.
a)
relative volume
b)
temperature
c)
relative pH
d)
chemical formula

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