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Solutions

Total questions: 46

Worksheet time: 1hrs 24mins

Name
Class
Date
1.
The substance that gets dissolved is called solvent.
True or False?
a)
True.
b)
False.
2.
Type of mixture in which all substances are evenly distributed is a?
a)
Solution
b)
Solute
c)
Solvent
3.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
4.
This is the part of a solution that dissolves
a)
Solute
b)
Solvent
c)
Solution
d)
Mixture 
5.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
6.
What is the reason why oil and water don't mix?
a)
Oil is too heavy to mix with water
b)
Water can only mix with polar molecules 
c)
Water can only mix with non-polar molecules
d)
Oil is too light to mix with water 
7.
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
8.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
9.
In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

a)
stir the powder in the liquid
b)
freeze the mixture
c)
add more powder to the liquid
d)
store the mixture in a dark place
10.
Which substance is MOST soluble at 0 ºC?
a)
KI
b)
NaNO3
c)
NaCl
d)
Ce2(SO4)3
11.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
12.
Another name for a homogeneous mixture is 
a)
an element.
b)
a solution.
c)
a compound.
13.
salt water is a 
a)
compound
b)
element
c)
heterogeneous mixture
d)
solution
14.
The image shown is an example of a ___________.
a)
solution
b)
mixture
c)
gas
d)
plasma
15.

Solubility refers to the ____ of solute that can dissolve in a certain volume or mass of solvent, at a certain temperature.

a)

Mean

b)

Range

c)

Amount

d)

Mode

16.
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
17.
In a sample of salt water, NaCl would be considered the ______.
a)
Solution
b)
Solute
c)
Solvent
d)
Solvation
18.

In a sample of seawater, the solvent is:

a)

water

b)

sea

c)

salt

d)

air

19.

Solutes that dissolve in water can be solids, liquids or gases

a)

true

b)

false

20.

A combination of two or more substances in which each substance retains its individual characteristics and properties

a)

mixture

b)

solution

c)

solvent

d)

solute

21.

Molecules that have unequal distribution of charges

a)

hydrogen bonds

b)

polar molecules

c)

solvent

d)

solution

22.

Which statement is NOT true about pure water ?

a)

It has a pH of 7,0

b)

It is composed of polar molecules

c)

It is composed of ionic bonds

d)

It is a good solvent

23.
To break down and spread out evenly in a liquid
a)
Buoyancy
b)
Dissolve
c)
Mix
24.
When we put a substance in water and stir it to see if it dissolves we are testing for_______________________.
a)
Relative Density
b)
Solubility
c)
Mass
d)
Temperature
25.

How many Hydrogen atoms does a single water molecule have?

a)

1

b)

2

c)

3

d)

4

26.

What does "polar" mean?

a)

A molecule is cold

b)

A molecule has areas of positive and negative charge

27.

Our body and our cells contain an average of:

a)

10% of water

b)

50% of water

c)

70% of water

d)

100% of water

28.

A molecule of water is made by

a)

covalent bond (share electrons)

b)

ionic bond (one lose one gain)

29.
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
30.
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
31.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
32.
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
33.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
34.

A covalent bond is a chemical bond where two atoms share__________.

a)

protons

b)

neutrons

c)

valence electrons

d)

the same group on the periodic table

35.

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons is a _______________.

a)

nonpolar molecule

b)

polar molecule

c)

ionic compound

d)

metalic compound

36.

Atoms of a polar molecule share their atoms ___________.

a)

Equally

b)

Unequally

37.

Polar molecules will dissolve in other polar molecules and nonpolar molecules will dissolve in other nonpolar molecules.

a)

True

b)

False

38.

Why is it difficult to wash oil from your hands with plain water?

a)

Both substances are polar. Like polarities repel.

b)

Both substances are nonpolar. Like polarities repel.

c)

Water is nonpolar, and oil is polar, so they will not combine.

d)

Water is polar, and oil is nonpolar, so they will not combine.

39.
The molecular formula for water is
a)
W
b)
H2O
c)
2HO
d)
H2O
40.
If you made blue paint by dissolving dry blue paint powder into water, the liquid blue paint you made is a
a)
ion
b)
solute
c)
solution
d)
concentration
41.
Water helps maintain homeostasis in an organism, which of the following hold true to that?
a)
Its high specific heat
b)
Its ability to dissolve substances
c)
Its ability to be a polar molecules and have a pH of 7
d)
all of these
42.
What property of water is being shown?
a)
polarity
b)
freezing point
c)
hydrogen bonds
d)
solution/universal solvent
43.

What does "like dissolves like" mean?

a)

polar solvents dissolve in polar solutes

b)

polar solutes dissolve in polar solvents

c)

non-polar solvents dissolve in polar solutes

d)

non-polar solutes dissolve in polar solvents

44.

The various chemicals that make up butter are generally ___

a)

polar

b)

nonpolar

c)

soluble in water

d)

ionic compounds

45.

The oxygen sides of water are always doing their best to orient themselves toward ___

a)

magnetic north

b)

the hydrogen sides of other molecules

c)

negative ions

d)

the surface of a liquid

46.

Why is it difficult to wash oil from your hands with plain water?

a)

Both substances are polar. Like polarities repel.

b)

Both substances are nonpolar. Like polarities repel.

c)

Water is nonpolar, and oil is polar, so they will not combine.

d)

Water is polar, and oil is nonpolar, so they will not combine.

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