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Acids and Bases

Total questions: 68

Worksheet time: 45mins

Name
Class
Date
1.

What are Acids?

a)

A substance that produces hydrogen (H+) ions in a gaseous solution

b)

A substance that produces hydroxide ions when dissolved in water.

c)

A substance that produces hydroxide protons when dissolved in water.

d)

A substance that produces hydrogen (H+) ions when dissolved in water.

2.

What are bases?

a)

A substance that produces hydroxide ions when dissolved in water.

b)

A substance that produces hydrogen (H+) ions when dissolved in water.

c)

A substance that produces hydrogen (H+) protons when dissolved in water.

d)

A substance that produces hydroxide electrons when dissolved in water.

3.
Which has a pH below 7?
a)
Acid
b)
Base
4.
Which has a bitter taste?
a)
Base
b)
Acid
c)
flagella
d)
cila
5.
Which has a slippery texture?
a)
Acid
b)
Base
6.
Turns litmus red
a)
Acids
b)
Bases
c)
All
7.

What pH is the strongest base?

a)

1

b)

7

c)

4

d)

14

8.

What colour does a base turn red litmus paper?

a)

Red

b)

Blue

9.
What methods can you use to measure the pH of a solution?
a)
Observing color or clarity
b)
Measuring mass or volume
c)
Measuring density or electrical conductivity
d)
Using acid base-indicators or pH meters
10.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
11.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
12.
Which of these pH values would indicate that a solution is a weak base?
a)
4
b)
5.6
c)
8
d)
13
13.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
14.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
15.
Acids react with
a)
water to produce bases and salts
b)
salts to produce bases and water
c)
neither bases, salts nor water
d)
bases to produce salts and water
16.

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

17.

HF is...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

18.

HNO2

a)

a base

b)

a salt

c)

an acid

d)

an ionic compound

19.
Releases hydrogen in an aqueous solution.
a)
base
b)
strong base
c)
acid
d)
weak base
20.

KOH is ...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

21.
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.
22.

What completely ionizes in solution?

a)

Weak acids

b)

Strong acids

c)

Strong Salts

d)

Neutral salts

23.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20
24.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
25.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
26.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
27.
Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.
a)
lower
b)
higher
c)
the same
d)
none of the above
28.

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.

29.

A base is a substance

a)

That releases OH- ions when dissolved in water

b)

That releases H+ ions when dissolved in water

c)

Does not release any ions when dissolved in water

d)

None of the above

30.
On the pH scale higher numbers indicate
a)
acids
b)
bases
31.
If you have a substance with a pH of 7.1 it is a(n).....
a)
Acid
b)
base
32.

An acid

a)

is a substance that releases H+ ions when dissolved in water

b)

is a substance that does not release any ions when dissolved in water

c)

is a substance that releases OH- when dissolved in water

d)

releases an equal amount of OH- and H+ ions when dissolved in water

33.

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

34.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
35.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
36.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
37.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
38.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
39.

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

40.
A solution with a pH of 7.0 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
41.

A chemical has a pH = 8. It would be best described as

a)

Strong acid

b)

Strong base

c)

Weak acid

d)

Weak base

42.

A chemical has a pH = 13. It would be best described as

a)

Strong acid

b)

Strong base

c)

Weak acid

d)

Weak base

43.

A chemical has a pH = 2. It would be best described as

a)

Strong acid

b)

Strong base

c)

Weak acid

d)

Weak base

44.
Litmus paper is an indicator of acids and bases, it turns red for bases.
a)
True
b)
false
45.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
46.
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
47.
What is a substance that is one color in an acid and another color in a base? 
a)
Oxidizer
b)
Indicator
48.
What color does litmus paper turn in the presence of an acid?
a)
Red
b)
Blue
49.
The pH of a strong acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
50.
The pH of a strong base would be:
a)
1-2
b)
5-6
c)
8-9
d)
13-14
51.
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
52.
How would you classify the substance being tested?
a)
Acid
b)
Base
c)
Both
d)
Neither
53.

Reacts with metals

a)

acid

b)

base

c)

both acid and base

54.

Produces a salt and water in a neutralization reaction

a)

acid

b)

base

c)

both an acid and a base

55.

Tastes bitter

a)

acid

b)

base

c)

both an acid and a base

56.

tastes sour

a)

acid

b)

base

c)

both an acid and a base

57.

Ends with "OH-"

a)

acid

b)

base

c)

both an acid and a base

58.

Turns indicators different colors

a)

acid

b)

base

c)

both an acid and a base

59.

Compound starts with an "H"

a)

acid

b)

base

c)

both an acid and a base

60.

Conducts electricity (has electrolytes)

a)

acid

b)

base

c)

both an acid and a base

61.

A neutralization reaction will always produce

a)

Water & salt

b)

Water

c)

Salt

d)

Water and carbon

62.

In a neutral solution the litmus paper color remain same

a)

True

b)

False

63.
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.
64.

pH stands for: (Should be easy enough. If you don't get it, it's LITERALLY in the picture)

a)

Potency of hydrogen

b)

Plurality of hydrogen

c)

Potential of hydrogen

d)

Pleurisy of hydrogen

65.
Which of the following is NOT a characteristic of an acid?
a)
sour taste
b)
corrosive
c)
it feels slippery
d)
it can burn the skin
66.

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

a)

battery

b)

vinegar

c)

milk

d)

blood

67.

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

a)

baking soda

b)

ammonia solution

c)

tomato

d)

bleach

68.

Which is the correct set of acid properties?

a)

sour taste, corrosive, change litmus from red to blue

b)

sour taste, corrosive, change litmus from blue to red

c)

sweet taste, slippery, change litmus from blue to red

d)

sour taste, slippery, change litmus from blue to red

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