# chemistry

posted by
**John** on
.

Will a fluoride concentration of 1.0 mg/L be soluble in a water containing 200 mg/L of calcium?

This is what i found for ksp

CaF2<--> Ca(2+) +2F(-) Ksp=(x)(4x^2) where x=solubility Therefore, Ksp=3.7 x 10^-11

and for Qsp I am not sure how to go on about calculating that.