Q.

The standard solubility product of a salt having general formula MX2 in water 4 ×10-12 The concentration of M2+ ions in the aqueous solution of the salt is

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a

 4.0 × 10-6M 

b

2.0 × 10-6M

c

1.6 ×10-4M 

d

 1.0 ×10-4 M

answer is D.

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Detailed Solution

For the MX2 salt, we have MX2M2++2X2s Ksp=(s)(2s)2=4s3

s=Ksp41/3=4×10124M1/3=104M

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