Practice Midterm Exam #1 -- Chem 2C (B)
Fall 2007
Name
POTENTIALLY USEFUL INFORMATION and a PERIODIC CHART
are given on the last two pages of this exam
Problem (possible
Points)
Points
1-10 (40)
11 (12)
12 (8)
13
(20)
14
(20)
TOTAL (100)
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Chem 2C(B) – Fall 07
2
Practice Midterm 1
Name
2
Each multiple choice question is worth 4 points.
Circle the BEST answer.
Only ONE
answer will be graded--if two are circled--the answer will be counted as WRONG!
1.
Consider the following reaction:
Cd(s) + 2AgCl(s) ––> Cd
2+
(aq) + 2Ag(s) + 2Cl
—
(aq)
In this reaction, the reducing agent is
(a)
Cd(s)
(b)
AgCl(s)
(c)
Cd
2+
(d)
Ag(s)
(e)
Cl
–
(aq)
2.
The equilibrium constant for the reaction 2Hg(l) + 2Cl
—
(aq) + Ni
2+
(aq)
Æ
Ni(s) +Hg
2
Cl
2
(s) is 5.6 x 10
-20
at 25
˚
C.
Calculate E
˚
for a cell utilizing this
reaction.
(a)
—0.25 V
(b)
+0.57 V
(c)
+1.14 V
(d)
—0.57 V
(e)
—1.14 V
3.
The standard potential of the Ag
+
/Ag electrode is +0.80 V and the standard
potential of the cell
Fe(s)|Fe
2+
(aq) ||Ag
+
(aq)|Ag(s)
is +1.24 V. What is the standard potential of the Fe
2+
/Fe electrode?

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