Worksheetsacid ,bases and salt
Total questions: 20
Worksheet time: 1hrs 17mins
Name
Class
Date
1.
metal oxides are generally
a)
acidic in nature
b)
basic in nature
c)
neutral
d)
some may be acidic some may be basic
2.
HCl is aciidic in
a)
in gaseous state
b)
in benzene solution
c)
in aqueous solution
d)
in any of these
3.
in aqueous solution, H+ ions exist as
a)
H30+
b)
H9O4+
c)
Neither of these
d)
either H30+ or H9O4+
4.
which of the acids are called king of chemicals
a)
H Cl
b)
H2so4
c)
HNo3
d)
vinegar(acetic acid)
5.
Litmus solution is purple colured dye extracted from (a) plant
6.
phenophthalein has __________ colur in basic solution.
a)
red
b)
pink
c)
yellow
d)
green
7.
What property do all three of these common household substances have in common?
a)
they are all basic
b)
they taste sour
c)
they have a pH below 7
d)
they all turn litmus paper red
8.
If you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH?
a)
add more acid
b)
add more water
c)
increase the temperature
d)
add a base
9.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
10.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
11.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
12.
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
13.
On the pH scale what numbers are bases?
a)
8-14
b)
0-7
c)
7
d)
1
14.
Which type of ion does an acid produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydronium
d)
hydroxide
15.
What is the pH of a solution that results from the complete neutralization of an HCl solution with a KOH solution?
a)
1
b)
7
c)
10
d)
4
16.
Salts
a)
formed from joining positive and negative ions
b)
increase OH ions
c)
forms a salt and water
d)
increases H2O ions
17.
Which of the following is a salt: ammonia or sodium chloride?
a)
ammonia
b)
sodium chloride
18.
The difference between a strong and weak acid is:
a)
Strong acids stay intact in water weak acids don't
b)
Strong acids are slippery weak acids aren't
c)
Strong acids break apart in water. Weak acids stay intact
d)
Weak acids break apart in water most of the time, strong acids do all of the time.
19.
Pickles form by soaking in an acid. What are some properties of pickles
a)
Conducts electricity, bitter, turns litmus blue
b)
Slippery, sour, turns litmus blue
c)
Slippery, bitter, turns litmus blue
d)
Sour, turns litmus red, can conduct electricity
20.
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
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