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Solutions TEST

Total questions: 25

Worksheet time: 48mins

Name
Class
Date
1.
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.
2.

Why does ice stay at the top of oceans instead of sinking to the bottom? 

a)

Ice is colder than liquid water

b)

Ice is less dense than liquid water

c)

Ice is more dense than liquid water

d)

Ice is warmer than liquid water

3.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
4.
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
5.
Kool-Aid - Powder, sugar, and water
Identify the solvent 
a)
water
b)
powder
c)
sugar
d)
powder and sugar
6.

At 40oC This solution would be considered

a)
Unsaturated
b)
Supersaturated
c)
Saturated
d)
Undefined
7.
How many grams of ammonium chloride are needed to make a saturated solution at 80o C?
a)
50 grams
b)
80 grams
c)
65 grams
d)
75 grams
8.
At 40oC which salt is least soluble?
a)
KClO3
b)
NaCl
c)
KI
d)
KNO3
9.

Which of the following factors does NOT affect the solubility of a substance?

a)

Temperature

b)

Pressure

c)

Color

d)

Size of the solute

10.

Type of solution that cannot conduct an electrical current

a)

Nonelectrolyte

b)

Electrolyte

c)

Weak Electrolyte

d)

Strong Electrolyte

11.

What would the molarity of a solution be if you took 10 mL of a 13M stock solution and made a 300 mL solution?

a)

390M

b)

230M

c)

0.43M

d)

0.26M

12.

How many mL of 1.0M KBr solution would you need to prepare 250 mL of a 0.2M dilution?

a)

175 mL

b)

250 mL

c)

50 mL

d)

5 mL

13.
Calculate the molarity of the following solution:  1.0 mole of KCl in 750.0 mL of solution.
a)
0.750 M
b)
99 M
c)
1.3 M
d)
2.0 M
14.
How many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide? 
a)
2
b)
3
c)
4
d)
15.
How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?
a)
1074 mol
b)
0.069 mol
c)
1.07 mol
d)
62.7 mol
16.

NH4Br

a)

Soluble

b)

Insoluble

17.

PbCl2

a)

Soluble

b)

Insoluble

18.

LiNO3

a)

Soluble

b)

Insoluble

19.

How does a solution become supersaturated?

a)

Vigorous stirring to dissolve more solute than usual.

b)

Heat the solution to increase the solute then let it cool.

c)

Add more solvent to lower the concentration.

d)

Keep pouring solute in the solvent until it goes in.

20.
What does it mean to dilute a solution?
a)
lower the concentration of solute per solvent
b)
increase the concentration of solute per solvent
21.

 
If you have 2.5 moles of glucose in 0.5 L of solution, what is the concentration of the solution?

a)

0.5 M

b)

1.25 M

c)

2.5 M

d)

5 M

22.

If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it?

a)

0.30M

b)

3.78 M

c)

.389 M

d)

1.76 M

23.

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

a)

0.067 mL

b)

60.0 mL

c)

100 mL

d)

125 mL

24.

125.0 mL of 2.00 M calcium hydroxide solution is diluted to a concentration of 1.50 M. What is the new volume?

a)

167 mL

b)

42.0 mL

c)

93.8 mL

d)

0.0240 mL

25.

universal solvent

a)

the tendency of a liquid to rise or fall as a result of surface tension

b)

creates skin-like surface formed due to the polar nature of water

c)

property of water that enables it to dissolve more substances than any other liquid

d)

the heat required to raise the temperature of a given substance by a given amount