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Chapter 6 Test (Solution Chemistry) 2010 A

 1. 
The particles in a colloid are
A.
too small to scatter light.
B.
the same as solute particles in a solution.
C.
undissolved particles that do not settle out.
D.
larger than particles in a suspension.
 

 2. 
Acids naturally present in food are safe to eat because they usually are
A.
strong.
B.
dilute.
C.
weak.
D.
concentrated.
 

 3. 
When a solute is added to a solvent, the freezing point of the solution is
A.
the same as the freezing point of the pure solute.
B.
higher than the freezing point of the pure solvent.
C.
the same as the freezing point of the pure solvent.
D.
lower than the freezing point of the pure solvent.
 

 4. 
If I add too much water to my mug when making hot chocolate, I have made a __________solution
A.
weak
B.
concentrated
C.
strong
D.
dilute
 

 5. 
The pH scale measures the
A.
concentration of an acid.
B.
solubility of an acid.
C.
strength of an acid.
D.
concentration of hydrogen ions.
 

 6. 
What is one way to increase the solubility of carbon dioxide gas in water?
A.
Heat the water.
B.
Decrease the pressure.
C.
Chill the water.
D.
Increase the amount of sugar.
 

 7. 
A solution in which more solute may be dissolved is a(n)
A.
supersaturated solution.
B.
unsaturated solution.
C.
polysaturated solution.
D.
saturated solution.
 

 8. 
How might you be able to tell if a food you are eating contains an acid?
A.
It tastes sweet.
B.
it tastes chocolatey.
C.
it tastes bitter.
D.
It tastes sour.
 

 9. 
A substance that tastes bitter, feels slippery, and turns red litmus paper blue is a(n)
A.
salt.
B.
base.
C.
acid.
D.
indicator.
 

 10. 
Hydrochloric acid is an example of a(n)
A.
strong acid.
B.
concentrated acid
C.
dilute acid.
D.
weak acid.
 

 11. 
If a solution has a pH of 9, the solution is
A.
saturated.
B.
acidic.
C.
neutral.
D.
basic.
 

 12. 
Increasing the temperature of a solution will allow more gas to be dissolved in it.
 

 13. 
Any substance that forms hydrogen ions (H+) in water is a(n)
A.
indicator.
B.
base.
C.
acid.
D.
salt.
 

 14. 
The lower the pH number, the ___________ the concentration of hydrogen (H+) ions in solution.
A.
lower
B.
higher
 

 15. 
Which pH value represents a base?
A.
2
B.
5
C.
12
D.
7
 

 16. 
Describe the neutralization process and give an example of the reaction using hydrochloric acid (HCl) and potassium hydroxide (KOH).
 

 17. 
The two products of an acid & base neutralization reaction are
A.
salt & washing soda.
B.
water & sodium bicarbonate.
C.
water & acid.
D.
salt & water.
 

 18. 
How can you increase the solubility of a gas in a liquid solution?
A.
 Decrease the temperature of the solution.
B.
 Increase the pressure of the solution
C.
Choice A & B
D.
Decrease the pressure of the solution.
E.
 Heat the solute.
F.
 Put salt in it.
G.
Choice A & D
 

 19. 
Which statement about the structure of an atom is true?
A.
Electrons are not found in the atomic nucleus.
B.
A proton ‘cloud’ surrounds each atom.
C.
Protons have a negative charge.
D.
Protons are much more massive than neutrons.
 

 20. 
What scientific tool can be used to measure the amount of space occupied by a liquid?
A.
balance
C.
thermometer
B.
scale
D.
graduated cylinder
 

 21. 
Which statement about the structure of an atom is true?
A.
A proton ‘cloud’ surrounds each atom.
B.
Protons and electrons are roughly equal in mass.
C.
An electron ‘cloud’ surrounds each atom.
D.
Neutrons are not found in the atomic nucleus.
 

 22. 
Acids and bases are found in many products we use each day.
 

 23. 
Which values represent an acidic pH? (check all that apply)
 A.
2
 E.
8
 B.
7
 F.
12
 C.
4
 G.
3
 D.
6
 H.
1
 

 24. 
In water, bases form
A.
hydrogen gas.
B.
oxide ions.
C.
hydrogen ions.
D.
hydroxide ions.
 

 25. 
Which is a characteristic property of acids?
A.
Acids turn red litmus paper blue.
B.
Acids turn blue litmus paper red.
C.
Acids do not react with metals.
D.
Acids taste bitter.
 

 26. 
You can use indicators to
A.
test for conductivity.
B.
find the concentration of a solution.
C.
find the pH of a solution.
D.
find out if a solution is saturated.
 

 27. 
Normal rainfall is slightly acidic, which means its pH must be
A.
between 7 and 9.
B.
between 2 and 4.
C.
less than 2.
D.
between 5 and 7.
 

 28. 
An ionic compound that can form from the reaction of an acid with a base is a(n)
A.
acid.
B.
base.
C.
salt.
D.
corrosive.
 

 29. 
In a chemical reaction, an atom of lithium (Li) loses an electron, and an atom of chlorine (Cl) gains an electron. Which statement is true?
A.
The lithium ion and the chlorine ion will be attracted to each other.
B.
These particles will have the same charge.
C.
The lithium ion and the chlorine ion will repel each other.
D.
These ions will neither attract nor repel each other.
 

 30. 
A substance that changes color as a result of being exposed to an acid or base is known as a(n)
A.
supersaturation.
B.
indicator.
C.
incubator.
D.
saturated solution
 

 31. 
When 40 mL of alcohol form a solution with 30 mL of water,
A.
both alcohol and water are solvents.
B.
water is the solvent.
C.
neither alcohol nor water is a solvent.
D.
alcohol is the solvent.
 

 32. 
You are given three clear, colorless, unknown solutions, and red and blue litmus papers. Describe the steps you might take to correctly identify each solution as acidic, basic, or neutral.
 

 33. 
Neutralization is a reaction between
A.
an acid and a metal.
B.
a base and a salt.
C.
an acid and a base.
D.
salt and water.
 

 34. 
How might you be able to tell if a food you are eating contains a base?
A.
it tastes chocolatey.
B.
It tastes sour.
C.
it tastes bitter.
D.
It tastes sweet.
 

 35. 
Which pH value represents a solution with the highest concentration of (H+) ions?
A.
0
B.
4
C.
2
D.
8
 

 36. 
When a compound dissolves in water,
A.
it always breaks up into ions.
B.
each of its particles is surrounded by water molecules.
C.
it always conducts electricity.
D.
its particles surround individual water molecules.
 

 37. 
Bases feel slippery and taste sour.
 

 38. 
A liquid mixture in which particles can be seen and easily separated by settling or filtration is a
A.
solution.
B.
colloid.
C.
solvent.
D.
suspension.
 

 39. 
If a substance reacts with a carbonate to produce carbon dioxide gas it is likely a(n)
A.
neutral solution
B.
saturated solution
C.
acid
D.
basic solution
 

 40. 
It is possible to have a dilute strong acid.
 



 
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