`CaCl_(2)` की विलेयता `4 xx 10^(-8)` है Ksp तथा `10^(-2)M Ca(OH)_(2)` में इसकी नई विलेयता ज्ञात कीजिये?

Explanation

`underset(1)(CaCl_(2)) Leftrightarrow underset(s)(Ca^(+2)) +underset(2s)(2Cl^(-))`
`K_(sp)=4s^(2)=4(4 xx 10^(-8))^(3) =256 xx 10^(-24)`
`Ca(OH)_(2) to Ca^(+2)+2OH^(-)`
`C" 0 + 0"`
`underset(1)(CaCl_(2)) Leftrightarrow underset(s.+C)(Ca^(+2)+underset(2s.)(2Cl^(-))`
`K_(sp)=[Ca^(+2)] [Cl^(-)]^(2)`
`=[s.+C] [2s^(.)]^(2)=4s^(.3)+4s^(.2)C`
`K_(sp)=4s^(.2)C`
`s^(.2)=(ksp)/(4C)=(256 xx 10^(-24))/(4 xx 10^(-2))=64 xx 10^(-22)`
`s.=8 xx 10^(-11)"mol L"^(-1)`