Q.
Molar solubility of MOH2 in 0.2 M NaOH will be Ksp of MOH2=2×10-24 M3
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a
5×10-21 M
b
5×10-22 M
c
5×10-23 M
d
5×10-20 M
answer is C.
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Detailed Solution
MOH2⇋M+2S+2OH-2S NaOH→Na+0.2 M+OH-0.2 M Ksp=M+2OH-2 Ksp=S2S+0.22; 'S' is too small compared to 0.2M, it can be neglected; S=Ksp2×10-12=2×10-244×10-2=5×10-23 M
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