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Potential Hydrogen

Total questions: 25

Worksheet time: 15mins

Name
Class
Date
1.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
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.
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
5.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
6.

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.

7.

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

a)

2

b)

20

c)

10

d)

100

8.

The picture below shows the relative concentrations of H+ and OH- in a solution. Is the solution an acid or a base?

a)

acid

b)

base

9.

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

10.

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

11.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
12.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
13.
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
14.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
15.

Neutral solutions have a pH of

a)

pH of 2

b)

pH of 0

c)

pH of 7

d)

A neutral solution does not have a pH

16.
Litmus paper is an indicator of acids and bases, it turns red for bases.
a)
True
b)
false
17.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
18.
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
19.
The pH of a strong acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
20.
The pH of a strong base would be:
a)
1-2
b)
5-6
c)
8-9
d)
13-14
21.
According to the image, the substance tested is a...
a)
Acid
b)
Neutral
c)
Strong Acid
d)
Base
22.
According to the image, the substance tested is a...
a)
Acid
b)
Base
c)
Neutral
d)
Strong Acid
23.
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
24.
One benefit of litmus paper is that it...
a)
Tells you the pH of a substance
b)
It is inexpensive
c)
It connects to a computer
d)
You can make it with materials you have at home
25.
One drawback to a pH Meter is that it
a)
Is very expensive
b)
is not very accurate
c)
only tells you if a substance is an acid or a base
d)
is messy

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