Chem 220 Practice Test 1
This is just a sample of some of the sorts of questions I would consider reasonable for an
exam on the material we have covered in the last 3 weeks. The exam questions will not
be the same, but will also cover material from the last 3 weeks. This set of questions has
not been time tested and does not imply anything about the length of the actual exam.
Please also see the 1A and 1B parts.
1. 1.0 M solutions of all of the following are good conductors except :
a. HNO3
b. KBr
c. FeCl3
d. CH3OH
e. Na2SO4
2. If you mix 20.0 mL of a 3.00 M sugar solution with 30.0 mL of a 5.00 M sugar
solution, you will end up with a sugar solution of what molarity?
a. 2.00
b. 3.80
c. 4.00
d. 4.20
e. 8.00
3. Calculate the molarity of a solution prepared by dissolving 4.09 g of NaI (molar mass
= 149.9 g/mol) in enough water to make 312 mL of solution.
a. 76.3 M
b. 0.0131 M
c. 0.0875 M
d. 0.175 M
e. 1.66 M
4. Calculate the volume of 0.125 M HNO3 required to neutralize 25.0 mL of 0.250 M
NaOH.
____________
5. A solution with a pH of 2 is how many times more acidic than a solution with a pH
of 5?
a. 0.4
b. 3
c. 10
d. 100
e. 1000
6. Rank the following by decreasing solubility in water : (a) CH3CH2OH
(b) CH3CH2CH2CH2CH2CH2CH2CH2CH2CH2OH
