[SO_4^(2-) ]must be exceed what value to obtain aRaSO_4 (K_(sp) =4xx 10^(-11))ppt in 500 mLof a solutioncontaining 1xx10^(-4)"mole" of Ra^(2+)ions ?

[SO_4^(2-) ]must be exceed what value to obtain aRaSO_4 (K_(sp) =4xx 1

1.	[SO_4^(2-) ]must be exceed what value to obtain aRaSO_4 (K_(sp) =4xx 10^(-11))ppt in 500 mLof a solutioncontaining 1xx10^(-4)"mole" of Ra^(2+)ions ?
Answer» ` 4 xx 10^(-7)M` ` 2XX10^(-7) M` ` 0.001 M` ` 0.01 M` Solution :` IP gt KsP ` ` (10 ^(_4) ) [SO_4^(2-) ] gt 4 XX1 0^(-11)RARR [SO_4^(2-)] gt4 xx 10 ^(-7) ` moles` = 4xx 10 ^(-7)xx 0.5 = 2 xx 10 ^(_7) `