My and NY_(3), two nearly insoluble salts have the same K_(sp) value of 6.2xx10^(-13) at room temperature. Which statement would be true in regard to My and NY_(3) ?

My and NY_(3), two nearly insoluble salts have the same K_(sp) value o

1.	My and NY_(3), two nearly insoluble salts have the same K_(sp) value of 6.2xx10^(-13) at room temperature. Which statement would be true in regard to My and NY_(3) ?
Answer» The ADDITION of the salt of KY to the SOLUTION of MY and `NY_(3)` will have no effect on their SOLUBILITIES The molar solubilities of MY and `NY_(3)` in water are identical The molar SOLUBILITY of MY in water is less than that of `NY_(3)` The salts MY and `NY_(3)` are more soluble in 0.5 M KY than in pure water . Solution :`{:(MY,hArr,M^(+),+ ,Y^(-)),(S,,S,,S):}` `K_(sp)=[M^(+)][Y^(-)]=S_(1).S_(1)=S_(1)^(2)` or `S_(1)=sqrt(K_(sp))=7.87xx10^(-7) "mol" L^(-1)` `{:(NY_(3),hArr,N^(+),+ ,3Y^(-)),(S_(2),,S_(2),,3S_(2)):}` `K_(sp)=[N^(3+)][Y^(-)]^(3)=S_(2)(3S_(2))^(3)=27S_(2)^(4)` or `S_(2)=((K_(sp))/(27))^(1//4)=((6.2xx10^(-13))/(27))^(1//4)` `=3.89xx10^(-4)" mol" L^(-1)` Evidently , `S_(1) lt S_(2)`