WorksheetsIntroduction to Water Chemistry
Total questions: 20
Worksheet time: 13mins
Name
Class
Date
1.
The chemical compound of water is
a)
HO
b)
H2O
c)
H3O
d)
HO2
2.
Water is a universal solvent
a)
True
b)
False
3.
Pure water has a
a)
Neutral pH
b)
Negative pH
c)
Positive pH
d)
Both Negative and Positive pH
4.
A Compound that is being dissolved is called a
a)
Solution
b)
Solute
c)
Solvent
d)
Suspension
5.
A solvent is...
a)
substance into which the solute dissolves
b)
a compound being dissolved
c)
a substance that does not dissolve
d)
None of the above
6.
What is water made of?
a)
Water
b)
Liquid
c)
Hydrogen and oxygen
d)
Blue
7.
What is an example of something that dissolves in water
a)
Yourself
b)
Sugar
c)
A rock
d)
A boat
8.
A water strider can skate along the top of a pond because:
a)
covalent bonds result in water cohesion
b)
hydrogen bonds result in water cohesion (surface tension)
c)
water striders have adapted to take advantage of water cohesion
d)
low surface tension of water
9.
Why can water have no net charge but have slight charges in different parts of the molecule?
a)
The oxygen end is slightly negative and the hydrogen end is slightly positive
b)
The hydrogen end is slightly negative and the oxygen end is slightly positive
c)
The hydrogen and oxygen ends change in polarity
d)
Because it is hydrophobic
10.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
11.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
12.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
13.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
14.
Which types of compounds dissolve easily in water?
a)
Polar and Nonpolar
b)
Polar and Ionic
c)
Nonpolar and Ionic
d)
Covalent and Nonpolar
15.
Fish need oxygen from which molecule?
a)
O2
b)
The O in H2O
c)
The oxygen from a tank
d)
None of the above
16.
Which of these would LEAST affect turbidity?
a)
Algae
b)
Fish feces
c)
Salt
d)
Gasoline
17.
Acids have more what?
a)
OH ions
b)
OH- ions
c)
H+ ions
d)
All of the above
18.
Phosphates are important to life but can also cause what deadly phenomenon to occur?
a)
More oxygen availability
b)
More sunlight availability
c)
Fish thriving
d)
Eutrophication
19.
Which type of water makes soaps not work?
a)
Hard
b)
Soft
20.
What do chemists add to soap to allow it to work in hard water?
a)
nitrogen
b)
phosphates
c)
Artificial scents
d)
artificial colors
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