Solubility Review Questions Worksheet With Answers Page 14
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14SOLUBILITY REVIEW QUESTIONS
CHEMISTRY 12: SOLUBILITY REVIEW QUESTIONS
ANSWERS FOR WRITTEN RESPONSE
1.
The equilibrium will shift towards the left (more precipitate will be formed). Adding AgNO
3
+
will increase [Ag
] therefore the system will react by trying to minimize the stress (Le
Chatelier’s Principle).
-6
2.
K
= 2.3 x 10
sp
-11
3.
K
= 7.2 x 10
. Because K
is less than K
, no precipitate will be formed.
trial
trial
sp
4.
The equilibrium will shift towards the left (more precipitate will be formed). Adding KF will
-
increase [F
] therefore the system will react by trying to minimize the stress (Le
Chatelier’s Principle).
5.
18 grams
-9
6.
K
= 3.67 x 10
sp
7.
0.17 grams
-4
8.
K
= 2.8 x 10
. Because K
is less than K
, no precipitate will be formed.
trial
trial
sp
9.
a) Be(NO
)
, Ca(NO
)
, Mg(NO
)
3
2
3
2
3
2
Mg(OH)
2+
-
b) Mg
+ 2 OH
(aq)
(aq)
2 (s)
-9
10. K
= 7.3 x 10
. Because K
is greater than K
, a precipitate will be formed.
trial
trial
sp
2-
11. Solubility decreases. Adding K
SO
will cause the [SO
] to increase (because the
2
4
4
2-
K
SO
will dissolve). The increase in [SO
] will cause the equilibrium to shift towards
2
4
4
producing more CaSO
.
4 (s)
12. a) AgI
AgI
+
-
b) Ag
+ I
(aq)
(aq)
(s)
13. 92.3 grams
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