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Byju's Answer
Standard IX
Chemistry
Anomalous Solubility
calculate the...
Question
calculate the molar solubility of Ni(OH)
2
in 0.1 M NaOH . The ionic product of Ni(OH)
2
is 2 x 10
-15
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Solution
Ni(OH)
2
(s) <===> Ni
2+
(aq) + 2 OH¯ (aq)
Ionic product expression: :
Ionic product =[Ni
2
+
][OH
-
]
2
let molar solubility of Ni
2
+
be
x
M
then concentration of OH
-
=(2
x
+ 0.1) M
​2 x 10
-15
=
x
.(
2
x
+ 0.1)
2
Since
x
is very very small as compared to 0.1M thus ignoring 2
x
​x<<<0.1
2x10
-15
=0.01
x
x =2
x 10
-17
M
​Molar solubility of Ni(OH)
2
is
2
x 10
-17
M​
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