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WorksheetsMiddle School Acids and Bases
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
Ammonia has a pH of 12. Ammonia is __________.
a)
an acid
b)
a base
c)
an element
d)
a metal
2.
Soap is a weak base. What is true about the taste of bases?
a)
they taste sour
b)
they taste sweet
c)
they taste bitter
d)
they taste salty
3.
Explain what happens when a strong acid and a strong base are poured into the same container.
a)
they form separate layers
b)
they mix physically but not chemically
c)
they break apart into separate elements
d)
they react chemically to form a salt
4.
When dissolved in water, bases produce:
a)
acids
b)
salts
c)
hydrogen ions
d)
hydroxide ions
5.
Which of these solutions is an acid?
a)
Dish Soap: pH of 12
b)
Tomato Soup: pH of 4
c)
Baking Soda: pH of 9
d)
Drain Cleaner: pH of 14
6.
What does the pH scale measure?
a)
the concentration of acids and bases
b)
the malleability of a metal
c)
the temperature of the water in a swimming pool
d)
the amount of phosphorus in a compound
7.
Compounds form when _______________.
a)
atoms of one element bond together
b)
atoms of two or more elements bond together
c)
molecules of one element are mixed together
d)
molecules of two or more elements are mixed together
8.
The pH of vinegar is 2.5. Vinegar is a _____________.
a)
strong acid
b)
strong base
c)
weak base
d)
weak acid
9.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
10.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
11.
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
12.
Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is. Which of these pH values would be a strong acid?
a)
2
b)
6
c)
9
d)
13
13.
What is the pH of water?
a)
0
b)
4
c)
7
d)
14
14.
Williams collected a rain sample and measured its pH to be 5.6. What does this mean?
a)
the rain water is a weak base
b)
the rain water is neutral
c)
the rain water is a strong acid
d)
the rain water is a weak acid
15.
What does a pH of 1 indicate about a liquid?
a)
it is a very strong base
b)
it is a weak base
c)
it is a weak acid
d)
it is a strong acid
16.
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
17.
What is the pH of a neutral substance?
a)
0
b)
5
c)
7
d)
10
18.
Which of these pH values would indicate that a solution is a weak base?
a)
4
b)
5.6
c)
8
d)
13
19.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
20.
Any substance that produces hydroxide ions in water is known as _____________.
a)
an acid
b)
a hydrogen ion
c)
a base
d)
a neutral
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