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J-1
SAMPLE LABORATORY EXAMINATION
The following is an example of the
types of questions that you might expect on the laboratory examination.
Answers are given on the last page.
You should attempt to answer the questions first and then check your
answers.
You should review all of your laboratory
reports and quizzes to prepare for the laboratory examination.
SAMPLE
CHEMISTRY 101.3
LABORATORY EXAMINATION
MULTIPLE CHOICE
1.
(Exp A) The
balanced molecular equation for the formation of copper(II) carbonate
from copper(II)
nitrate is:
a.
Cu(NO3)2
(aq)
+ Na2CO3
(aq)
CuCO3
(s)
+ 2 NaNO3
(aq)
b.
Cu(NO3)2
(aq)
+ H2CO3
(aq)
??
CuCO3
(s)
+ 2 HNO3
(aq)
c.
Cu(NO3)2
(aq)
+ CO2
(g)
+
2
1
O2
(g)
CuCO3
(s)
+ 2 NO3
-
(aq)
d.
Cu(NO3)2
(aq)
+ CuCO3
(s)
CuCO3
(s)
+ Cu(NO3)2
(aq)
e.
none of the above
2.
(Exp A) What
volume of 0.550 M
Na2CO3,
sodium carbonate, would be required to react with 200
mL of a 0.393 M Cu(NO3)2
solution?
a.
29.5 mL
b.
14.3 mL
c.
143. mL
d.
2.95 mL
e.
9.72 mL
3.
(Exp C) A certain cobalt hydrate
was assayed in an analytical laboratory. After the addition of six
drops of 1.0 M
AgNO3 in HNO3 to
the hydrate solution, a white curdy precipitate was formed. The
mass of the anhydrous salt was 3.251g
and the mass of water lost was 2.750 g. The unknown hydrate
is:
a.
CoCl2
2 H2O
b.
CaBr2
9 H2O
c.
CoSO
4
4 H2O
d.
CoCl2
6 H2O
e.
CoBr2
10 H2O
