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V-4
(1.0)
7.
(Exp Q) To test whether a reaction between copper solid and bromine, Br2, would occur, a
student combined 1.0 mL of Br2 water with 2.0 mL of dichloromethane, CH2Cl2, in a test
tube and then added 0.20 g of powdered copper solid. What observations should be noted
about the CH2Cl2 layer?
a.
initially colorless and remaining colorless
b.
initially colorless then going purple
c.
initially purple then going colorless
d.
initially colorless then going orange
e.
initially orange then going colorless
(1.0)
8.
(Exp R) The following cell was set up:
Ag/Ag
+
(0.010 M ) // Ag
+
(1.0 M)/Ag
What is the half-cell potential for the oxidation reaction in the anode half-cell?
a.
-0.92V
b.
-0.68V
c.
-0.06V
d.
+0.12V
e.
+0.80V
(1.0)
9.
(Exp R) For the reaction:
[Fe(CN)
6
]³
-
(aq)
+ Ag
(s)
+ Cl
-
(aq
)
AgCl
(s)
+ [Fe(CN)
6
]
4-
(aq)
,
the cell voltage, when the reaction is at equilibrium, would be:
a.
+0.355
b.
+0.222
c.
+0.133
d.
0.000
e.
-0.133
