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Solutions and Solubility

Total questions: 50

Worksheet time: 44mins

Name
Class
Date
1.

You can make a solute dissolve more quickly in a solvent by

a)

adding more solute.

b)

adding ice.

c)

heating the solvent.

d)

removing some solvent.

2.

A solution that contains all of the solute it can hold at a given temperature is

a)

diluted.

b)

saturated.

c)

supersaturated.

d)

unsaturated.

3.

The amount of solute that can be dissolved in a specific amount of solvent at a given temperature is its

a)

concentration.

b)

density.

c)

dilution.

d)

solubility.

4.

Three 10 g samples of sugar are represented below.


Sample A dissolves in water more slowly than sample B.

Sample B dissolves more slowly than sample C.

Which of the following best explains why sample A dissolves more slowly than the other two?

a)

It has the most volume.

b)

It has the smallest surface area.

c)

It has the largest number of sugar molecules.

d)

It has the fewest bonds between sugar modules.

5.

A technican prepared a solution by heating 100 mL of distilled water while adding KCl crystals until no more KCl would dissolve. She then capped the clear solution and set it aside on the lab counter. After several hours she noticed the solution had become cloudly and some solid had settled to the bottom of the flask. Which statement best describes what happened?

a)

As the solution cooled, evaporation of water increased the KCl concentration beyond its solubility.

b)

Water molecules, trapped with the KCl crystals, were released after heating.

c)

At lower temperatures the solubility of KCl decreased and recrystallization occurred.

d)

At increased temperatures the solubility of KCl increased and remained too high after cooling.

6.

A student pours mineral salts into a bottle of cold water. Which of the following best explains why shaking the bottle will affect the dissolving rate of the salt?

a)

Shaking exposes the salts to the solvent more quickly.

b)

Shaking helps more water evaporate.

c)

Shaking equalizes the water temperature.

d)

Shaking causes more ions to precipitate out of solution.

7.

Students in Ms. Martinez's science class are investigating how temperature, in degrees Celsius (C), affects the solubility of a compound in 100 milliliters (mL) of water. Ms. Martinez provides the students with a graph that shows the solubility of a certain compound, as shown below.


She then tell the students that she will demonstrate how many grams (g) of the compound will dissolve in 100 mL of water at 40 C. Based on the information in the graph, which of the following is the best prediction of how many grams of the compound will dissolve at 40 C?

a)

40 g

b)

65 g

c)

85 g

d)

100 g

8.

The solubility graph below shows the amounts of four substances that will dissolve in 100 grams of water at various water temperatures.


Which substance has 80 grams of solute dissolved in 100 grams of water at 50 C?

a)

Potassium Bromide

b)

Ammonium Chloride

c)

Potassium Chloride

d)

Lithium Hydroxide

9.

A solution that is able to dissolve additional solute is best described as

a)

supersaturated.

b)

concentrated.

c)

saturated

d)

unsaturated.

10.
Which is an example of a solute?
a)
Egg whites
b)
Sugar
c)
Water
d)
Acetone
11.
Which is an example of a solvent?
a)
Salt
b)
Egg whites
c)
Water
d)
Sugar
12.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
13.

Is water the only solvent that can dissolve solutes?

a)

Yes

b)

No

14.

Define the term soluble.

a)

Can dissolve in water

b)

Cannot dissolve in water

c)

Partially dissolves in water

15.

Define the term insoluble.

a)

Can dissolve in water.

b)

Cannot dissolve in water.

c)

Partially dissolves in water.

16.
Solution where more solute can still be dissolved at the given temperature. 
a)
Saturated
b)
Unsaturated
c)
Mixture
d)
Homogeneous solution
17.
What does it mean to dilute a solution?
a)
lower the concentration of solute per solvent
b)
increase the concentration of solute per solvent
18.
You can make a solution more concentrated by adding __________.
a)
solute
b)
solvent
c)
water
19.
A solution is a ___________ mixture of two or more substances evenly distributed through out a single phase.
a)
homogeneous 
b)
heterogeneous 
c)
solvent 
d)
suspension 
20.
The solution salt needs ___ grams of solute dissolved in 100ml of water at 60⁰ C to make the solution supersaturated 
a)
200 grams 
b)
350 grams
c)
290 grams
d)
300 grams
21.
Oil molecules are nonpolar. What kind of solvent is required to remove an oil stain?
a)
saturated
b)
unsaturated
c)
polar
d)
nonpolar
22.
If an electrical current can run through a solution, it is said to contain
a)
magic
b)
nonelectrolytes
c)
electricity
d)
electrolytes
23.
Which of the following is an electrolyte?
a)
sodium chloride
b)
sugar (carbon, oxygen, hydrogen)
c)
water (hydrogen and water)
d)
sand (silicon and oxygen)
24.
The "like dissolves like" rule is the reason why water cannot dissolve
a)
salt
b)
sugar
c)
vinegar
d)
oil
25.
This type of mixture contains two or more substances that are visibly distinguishable. 
a)
homogeneous
b)
heterogeneous
c)
solution
d)
colloid
26.
When a substance can dissolve in another substance, it is said to be..
a)
soluble
b)
insoluble
c)
miscible
d)
immiscible
27.

Water is the universal solvent

a)

true

b)

false

28.
A beaker containing 80 grams of lead(II) nitrate, Pb(NO3)2, in 100 grams of water has a temperature of 30 ºC. Approximately how many grams of the salt are undissolved, on the bottom of the beaker?
a)
20 grams
b)
80 grams
c)
66 grams
d)
14 grams
29.
Which salt is LEAST soluble at 0 ºC?
a)
K2Cr2O7
b)
KNO3
c)
 KClO3
d)
Ce2(SO4)3
30.
How many grams of sodium nitrate, NaNO3, are soluble in 100 g of water at 10 ºC?
a)
80 grams
b)
100 grams
c)
40 grams
d)
10 grams
31.
At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?
a)
60 ºC
b)
30 ºC
c)
50 ºC
d)
83 ºC
32.
When 30 grams of potassium nitrate, KNO3, is dissolved in 100 grams of water at 20 ºC, the solution can be correctly described as:
a)
saturated
b)
unsaturated
c)
supersaturated
33.
What factors DO NOT affect solubility 
a)
Temperature
b)
Pressure 
c)
Color
34.

Which of the following techniques will allow for more solute than normal to be dissolved in a solvent?

a)

Freezing the solution

b)

Shaking the solute

c)

Cooling the solution

d)

Heating the solution

35.

Which of the following should be done to make the solute dissolve faster in the solvent?

a)

Stir the solute

b)

Freeze the solute

c)

Decrease the temperature of the solvent

d)

Increase the particle size of the solute

36.

Which would NOT increase the rate at which a sugar cube dissolves?

a)

Reducing the amount of solvent

b)

Crushing the sugar cube

c)

Stirring the solution

d)

Heating the solvent

37.
This solution would be considered
a)
Unsaturated
b)
Supersaturated
c)
Saturated
d)
Undefined
38.
This graph represents a(n) ___ solution
a)
saturated
b)
supersaturated
c)
unsaturated
d)
undefined
39.

How many grams are soluble in 100 g of water at 100 ºC?

a)

300 grams

b)

250 grams

c)

100 grams

d)

50 grams

40.

Identify how many grams of KNO3 are required to make a saturated solution at 40'C.

a)

50 g

b)

45 g

c)

60 g

d)

33 g

41.

Which of the following refers to substances that do not mix together and look different throughout?

a)

homogeneous mixture

b)

solution

c)

heterogeneous mixture

d)

solubility curve

42.
What conclusion can be made using this solubility curve?
a)
Decreasing temperatures always increases solubility 
b)
Increasing temperatures always increases solubility
c)
Increasing temperatures usually increases solubility
d)
Temperature has no affect on solubility
43.
What does this solubility curve show?
a)
Solubility increases as temperature increases
b)
Solubility decreases as temperature decreases
c)
Solubility decreases as concentration increases
d)
Solubility is not affected by temperature
44.

This is an example of a

a)

Solution

b)

Mixture

45.

Sugar dissolved in water is an example of a

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

46.

Which substance is MOST soluble at 90 ºC?

a)

Solid A

b)

Solid B

c)

Solid C

47.

Which solute is least soluble at 90 ⁰C?

a)

solid A

b)

solid B

c)

solid C

48.
Olive Oil
a)
Heterogeneous  mixture
b)
Homogeneous mixture
49.

Which is an example of a solution?

a)

Chex Mix

b)

Mixed fruit

c)

Gatorade

d)

milk and cereal

50.

According to the table how many of the solutes are nonpolar?

a)

1

b)

2

c)

3

d)

4

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