1.

MY and NY_(3), two nearly insoluble salts, have the same K_(sp) values of 6.2 xx 10^(-13) at room temperature. Which statement would be true in regard to MY and NY_(3

Answer»

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
The addition of the salt of KY to solution of MY and `NY_(3)` will have no EFFECT on their solubilities

Solution :`MY rarr K_(sp) = s^(2) = 6.2 XX 10^(-13)`
`s = sqrt(6.2 xx 10^(-13))`
`s = 7.87 xx 10^(-7) mol L^(-1)`
`NY_(3) rarr K_(sp) = 27 s^(4) = 6.2 xx 10^(-13)`
`s = ((6.2 xx 10^(-13))/(27))^(1//4) = s = 3.89 xx 10^(-4) mol L^(-1)`
`:.` Molar solubility of `NY_(3)` is more than MY in water.


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