Name: 
 

Practice Test - Solutions



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

A solution that contains a large amount of solute is best described as
a.
unsaturated.
c.
dilute.
b.
concentrated.
d.
weak.
 

 2. 

Which of the following would NOT increase the rate at which a solid dissolves?
a.
decreasing the temperature
c.
stirring
b.
crushing the solid
d.
increasing the temperature
 

 3. 

Which factor does NOT increase the speed at which a solid solute dissolves in water?
a.
stirring or shaking the mixture
c.
adding more solute
b.
heating the mixture
d.
crushing the solute
 

 4. 

What is often called the universal solvent?
a.
sodium
c.
vinegar
b.
air
d.
water
 

 5. 

A solution is a(n)
a.
compound composed of two or more substances.
b.
homogeneous mixture.
c.
heterogeneous mixture.
d.
insoluble solute in a solvent.
 

 6. 

Salt water is a(n)
a.
solution.
c.
colloid.
b.
suspension.
d.
compound.
 

 7. 

Which of the following has a component that MUST be soluble?
a.
mixture
c.
solution
b.
suspension
d.
heterogeneous mixture
 

 8. 

You have four solutions of salt water. Solution 1 has 55 g of salt dissolved in 500 mL of water. Solution 2 has a concentration of 0.21 g/mL. Solution 3 has 36 g of salt dissolved in 144 mL of water. Solution 4 has a concentration of 0.23 g/mL. Which of the following lists the solutions in order from the least concentrated to the most concentrated?
a.
1, 2, 3, 4
c.
1, 2, 4, 3
b.
2, 4, 3, 1
d.
3, 4, 2, 1
 

 9. 

Which method of describing how much solute is dissolved in a solvent is the most specific?
a.
describing it in terms of its saturation     
b.
describing it in terms of being concentrated or dilute
c.
calculating the concentration
d.
All of the above are equally specific.
 

 10. 

Which of the following is NOT a solution?
a.
brass
c.
ocean water
b.
air
d.
carbon dioxide
 

 11. 

A solution that contains less solute than it can hold at a given temperature is
a.
saturated.
c.
concentrated.
b.
unsaturated.
d.
supersaturated.
 

 12. 

What is the concentration of a solution in which 30 g of salt has been dissolved in 200 mL of saltwater solution?
a.
0.15 g/mL
c.
15.0 g/mL
b.
6.67 g/mL
d.
30.0 g/mL
 

 13. 

The solubility of most solids ____ as the temperature increases.
a.
increases
c.
remains the same
b.
decreases
d.
becomes more dilute
 

 14. 

Which of the following does NOT usually increase the speed at which a solid dissolves?
a.
mixing by stirring or shaking
c.
crushing the solute
b.
heating
d.
adding ice
 

 15. 

You add sugar to 50 mL of hot tea and to 50 mL of iced tea until each is saturated. Which cup would have a higher concentration?
a.
the iced tea
b.
the hot tea
c.
The concentrations of the hot tea and the iced tea are the same.
d.
Not enough information is given to answer the question.
 

 16. 

Why does mixing increase the speed at which a solid dissolves?
a.
Mixing causes the solute particles to separate from one another and spread out more quickly among the solvent particles.
b.
Mixing causes particles to move more quickly, causing them to spread out more quickly.
c.
Mixing increases the amount of contact between the solute and the solvent.
d.
Mixing does not affect the speed at which a solid dissolves.
 

 17. 

Why does heating increase the speed at which a solid dissolves?
a.
Heating causes the solute particles to separate from one another and spread out more quickly among the solvent particles.
b.
Heating causes particles to move more quickly, causing them to spread out more quickly.
c.
Heating increases the amount of contact between the solute and the solvent.
d.
Heating does not affect the speed at which a solid dissolves.
 

 18. 

Why does crushing a solid increase the speed at which the solid dissolves?
a.
Crushing causes the solute particles to separate from one another and spread out more quickly among the solvent particles.
b.
Crushing causes particles to move more quickly, causing them to spread out more quickly.
c.
Crushing increases the amount of contact between the solute and the solvent.
d.
Crushing does not affect the speed at which a solid dissolves.
 

 19. 

A mixture of two or more substances that is uniform at the molecular level is considered a(n):
a.
atom.
b.
compound.
c.
molecule.
d.
solution.
 

 20. 

An example of a mixture that is NOT a solution is:
a.
salt and pepper in the same shaker.
b.
iron and carbon mixed to make steel.
c.
sugar, water, and flavoring in a drink.
d.
gold and silver as an 18-karat gold ring.
 



 
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