1.

If the solubility product of CuS is 6 xx 10^(-16), calculate the maximum molarity of CuS in aqueous solution .

Answer»

Solution :`K_(sp)` of CuS = `6 XX 10^(-16)`
If S is the solubility , then
`CuS to Cu^(2+) + S^(2-)`
`[Cu^(2+)] = S , [S^(2-)]= S`
`K_(sp) = [Cu^(2+)] [S^(2-)]`
`= S xx S= S^(2)`
Solubility S = `sqrt(K_(sp)) = sqrt(6 xx 10^(-6))`
`= 2.45 xx 10^(-8) M`
Highest molarity = `2.45 xx 10^(-8) M`


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