Assertion : On mixing 500 ml of 10^(-6) M Ca^(2+) ion and 500 ml of 30 xx 10^(-6) M F^(-)ion, the precipitate of CaF_(2) will be obtained. K_(sp) (CaF_(2) = 10^(-18)) Reason : If K_(sp) is greater than ionic product, a precipitate will develop.

Assertion : On mixing 500 ml of 10^(-6) M Ca^(2+) ion and 500 ml of 30

1.	Assertion : On mixing 500 ml of 10^(-6) M Ca^(2+) ion and 500 ml of 30 xx 10^(-6) M F^(-)ion, the precipitate of CaF_(2) will be obtained. K_(sp) (CaF_(2) = 10^(-18)) Reason : If K_(sp) is greater than ionic product, a precipitate will develop.
Answer» If both assertion and reason are TRUE and reason is the correct EXPLANATION of the assertion If both assertion and reason are true but reason is not the correct explanation of the assertion. If assertion is true but reason is FALSE. If the assertion and reason both are false. Solution :`CaF_(2) hArr Ca^(2+) + 2F^(-)` `K = ((10^(-6))/(2))((10^(-6))/(2))^(2) = 1.25 xx 10^(-19)` which is less than `K_(sp)`. Hence, no precipitate will develop. Thus, both assertion and reason are false.