Estimate the solubility of calcium fluoride, CaF2+, (a) in moles per liter and (b) in grams per liter of pure water.
CaF2+(s) = Ca2+(aq)+2f-(aq)

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  1. I have corrected the equation you wrote.
    .......CaF2(s) = Ca2+(aq)+2F-(aq)

    Substitute the E line into the Ksp expression and solve for x = solubility in mols/L.
    grams = mols in 1 L x molar mass

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