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Chemistry
Chemistry A Molecular Approach Study Set 2
Quiz 17: Aqueous Ionic Equilibrium
A Solution Contains 2
Question 65
Multiple Choice
A solution contains 2.2 × 10
-3
M in Cu
2+
and 0.33 M in LiCN.If the K
f
for Cu(CN)
4
2-
is 1.0 × 10
25
,how much copper ion remains at equilibrium? A) 3.8 × 10
-24
M B) 1.9 × 10
-26
M C) 6.7 × 10
-28
M D) 2.9 × 10
-27
M E) 4.6 × 10
-25
M
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Q 66
A solution contains 3.8 × 10
-2
M in Al
3+
and 0.29 M in NaF.If the K
f
for AlF
6
3-
is 7 × 10
19
,how much aluminum ion remains at equilibrium? A) 1.1 × 10
-19
M B) 3.1 × 10
-22
M C) 9.1 × 10
-19
M D) 1.9 × 10
-21
M E) 4.4 × 10
-20
M
Q 67
Calculate K. AgI(s)⇌ Ag
+
(aq)+ I
-
(aq)K
sp
= 8.5 × 10
-17
Ag
+
(aq)+ 2 NH
3
(aq)⇌ Ag(NH
3
)
2
2+
(aq)K
f
= 1.7 × 10
7
AgI(s)+ 2 NH
3
(aq)⇌ Ag(NH
3
)
2
2+
(aq)+ I
-
(aq)K = ? A) 1.7 × 10
7
B) 1.4 × 10
-9
C) 5.0 × 10
-24
D) 2.0 × 10
23
E) 6.9 × 10
8
Q 68
Calculate K. Cu(OH)
2
(aq)⇌ Cu
2+
(aq)+ 2 OH
-
(aq)K
sp
= 1.6 × 10
-19
Cu
2+
(aq)+ 4 NH
3
(aq)⇌ Cu(NH
3
)
4
2+
(aq)K
f
= 1.7 × 10
13
Cu(OH)
2
(aq)+ 4 NH
3
(aq)⇌ Cu(NH
3
)
4
2+
(aq)+ 2 OH
-
(aq)K = ? A) 1.06 × 10
32
B) 3.7 × 10
5
C) 9.4 × 10
-33
D) 2.7 × 10
-6
E) 1.7 × 10
13
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