Solubility product Ksp of a sparingly soluble salt Zn(CN)2 is 8×10−12. Its solubility value in (molL−1) is:
(Take 3√2=1.26)
A
1.26×10−4
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B
1.26×10−5
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C
1.26×10−6
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D
1.26×10−12
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Solution
The correct option is A1.26×10−4 Given Ksp=8×10−12
The equilibrium between the undissolved solid and the ions in a saturated solution can be represented by the equation: Zn(CN)2(s)⇌Zn2+(aq)+2CN−(aq)Initial:C00Equilibrium:C−ss2s