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Chemistry
Chemistry
Problem
Magnesium hydroxide,
M
g
(
O
H
)
2
(
s
)
Mg(OH)_2(s)
M
g
(
O
H
)
2
(
s
)
, has
K
s
p
=
1.8
×
10
−
11
K_{sp}=1.8\times10^{-11}
K
s
p
=
1.8
×
1
0
−
11
at 25 °C. Calculate the lowest pH at which the concentration of dissolved
M
g
2
+
Mg^{2+}
M
g
2
+
ions can be kept at or below
1.0
×
10
−
5
M
1.0\times10^{-5}\,\text{M}
1.0
×
1
0
−
5
M
in equilibrium with solid
M
g
(
O
H
)
2
Mg(OH)_2
M
g
(
O
H
)
2
.
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