The solubility product of a salt having general formula MX2 in water is 4 × 10-12. The concentration of M2+ ions in the aqueous solution of the salt is
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a
2 × 10-6 M
b
1 × 10-4 M
c
1.6 × 10-4 M
d
4.0 × 10-6 M
answer is B.
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Detailed Solution
MX2 ⇌ M2+ + 2X- S 2SKSPMX2 = 4S3 = 4 × 10-12∴ S = 10-4∴ M2+ = 10-4 M