Solubility Worksheet
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4Chem 1B
Name:_______________________
Chapter 16 Exercises
Solubility and Complex Equilibria
1.
Determine the solubility in (i) in mol/L, and (ii) in gram/L of each of the following salts:
–
10
(a) AgCl, K
= 1.6 x 10
sp
–
13
(b) AgBr, K
= 5.0 x 10
sp
–
12
(c) Ag
CrO
, K
= 9.0 x 10
2
4
sp
o
2.
The solubility of calcium hydroxide, Ca(OH)
, in water at 25
C is 0.51 g/L. Determine the solubility
2
product constant (K
) for calcium hydroxide.
sp
3.
A saturated solution of magnesium hydroxide, Mg(OH)
, has a pH = 10.42. What is the solubility of
2
Mg(OH)
in mol/L? Determine the K
of magnesium hydroxide.
2
sp
–
32
4.
Calcium phosphate, Ca
(PO
)
, has solubility product, K
= 1.3 x 10
. (a) What are the concentrations
3
4
2
sp
–
2+
3
of Ca
and PO
, respectively, in a saturated solution of Ca
(PO
)
. (b) If a hard water contains 75 ppm
4
3
4
2
–
2+
3
(75 mg/L) of Ca
, at what concentration of PO
would a precipitate of Ca
(PO
)
begin to appear?
4
3
4
2
5.
A solution containing 0.010 M AgNO
and 0.050 M Pb(NO
)
is titrated with 0.050 M NaCl solution.
3
3
2
–
(a) At what concentration of Cl
(i) AgCl begins to precipitate; (ii) PbCl
begins to precipitate?
2
+
(b) Determine the concentration Ag
in solution when the precipitation of PbCl
begins.
2
–
10
6.
Determine the solubility of AgCl (K
= 1.6 x 10
) in 0.010 M NaCl solution.
sp
7.
(a) Will precipitate of PbCl
form when a 30.0-mL solution of 0.20 M NaCl is added 20.0 mL of 0.20 M
2
–
2+
Pb(NO
)
solution? (b) If precipitate is formed, what are the concentrations of Pb
and Cl
,
3
2
respectively, in the saturated solution of PbCl
? (c) Determine if a precipitate will form if the initial
2
–
5
concentrations of Pb(NO
)
and NaCl were each 0.020 M? (K
= 1.6 x 10
).
3
2
sp
1
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