1.

MY and NY_3, two nearly insoluble salts have the same -K_(sp) values of 6.4xx10^(13) at room temperature. Which statement would be true in regard to MY and NY_3

Answer»

The salts of My and `NY_3` are more SOLUBLE in 0.5 (M) KY than in pure water
the ADDITION to the salt of KY to solutions of MY and `NY_3` will have no effect on their solubilities
Themolar solubilities of MY and `NY_3` in water are identical
The molar solubility of MY in water is less than that of `NY_3`

Solution :`MY(s) `K_(sp)=S_1^2`
or `S_1=SQRT(K_(sp))=sqrt(6.2xx10^(-13))mol*L^(-1)`
`NY_3(s) `K_(sp)=S_2(3S_2)^3=27S_2^4`
[`S_1`=Solubility of `NY_3` salt `(mol*L^(-1)`)
`S_2^4=(6.2xx10^(-13))/(27)`
or, `S_2=((6.2xx10^(-13))/(27))^(1//4)" ":.S_1ltS_2`


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