WorksheetsUnit 4 Acids and Bases
Total questions: 20
Worksheet time: 14mins
Name
Class
Date
1.
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
2.
What is the pH of water?
a)
0
b)
4
c)
7
d)
14
3.
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
4.
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
5.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
6.
Any substance that produces hydroxide ions in water is known as _____________.
a)
an acid
b)
a hydrogen ion
c)
a base
d)
a neutral
7.
A hydrogen ion, H+, is the same as a(n):
a)
neutron
b)
electron
c)
proton
d)
hydroxide ion
8.
What is the range of pH values in an acidic solution?
a)
0-7
b)
7-14
c)
15-239058204958
d)
pH = 7
9.
This is one way to show a neutral substance:
a)
[H+]=[OH-]
b)
[H+]~~[OH-]
c)
[H+]<[OH-]
d)
[H+]>[OH-]
10.
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
11.
Acids have a _______ taste.
a)
sour
b)
bitter
c)
sweet
d)
salty
12.
Bases are ____________.
a)
corrosive
b)
slippery
c)
sour
d)
low on the pH scale
13.
pH is a measure of
a)
the hydronium ion concentration
b)
the hydroxide ion concentration
c)
dissociation
d)
ionization
14.
A Bronsted acid is one that
a)
forms water and a salt
b)
is always neutral in solution.
c)
donates protons in solution.
d)
accepts protons in solution.
15.
Acids react with bases to form
a)
carbon dioxide gas
b)
hydrogen gas
c)
water and a salt
d)
water and sodium chloride
16.
IF the [H3O+] = 0.000000001, what is the pOH?
a)
9
b)
5
c)
4
d)
7
17.
Phenolphthalein turns red in
a)
acids.
b)
bases.
c)
salts.
d)
water.
18.
A strong base is defined as a substance which
a)
donates protons very strongly.
b)
accepts protons very strongly.
c)
form many hydronium ions.
d)
dissociates almost completely.
19.
An Arrhenius base is one defined as any substance which
a)
creates hydronium ions.
b)
creates water
c)
creates hydroxide ions
d)
dissociates completely
20.
Which is a diprotic acid?
a)
chlorous acid
b)
nitrous acid
c)
sulfurous acid
d)
phosphorous acid
100 %
