Which of the following is(are) correct when `0.1L` of `0.0015M MgCI_(2)` and `0.1L` of `0.025M NaF` are mixed togther? `(K_(sp) of MgF_(2) = 3.7 xx 106(-8))`.

Options

A. `MgF_(2)` remains in solution
B. `MgF_(2)` precipitates out
C. `MgCI_(2)` precipitates out
D. `CI^(Theta)` ions remains in solution

Answer

B, D

Explanation

`{:(MgCI_(2),NaF,["After dilution"]):}`
`7.5 xx 10^(-4)M 1.25 xx 10^(-2)M`
`I.P. of MgF_(2) = [Mg^(2+)] [F^(Theta)]^(2)`
`= (7.5 xx 10^(-4))(1.25 xx 10^(-2))^(2) gt K_(sp(MgF_(2)))`
`rArr MgF_(2)` will get precipitated and `CI^(Theta)` ions will remains in solution.