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Ksp = 3.2×10-11 for CaF2 at 25 °C. a)Calculate the molar concentration of fluoride ions in...

Ksp = 3.2×10-11 for CaF2 at 25 °C.
a)Calculate the molar concentration of fluoride ions in a saturated calcium fluoride solution at 25 °C using the assumption that the solution is ideal -- i.e. the activity coefficients are 1.

b)Still assuming an ideal solution, what mass of CaF2 would be dissolved in 100. mL of saturated solution at 25 °C?
c)Using activity coefficients γCa2+ = 0.405 and γF− = 0.76, calculate the maximum mass of CaF2 which can dissolve in 100. mL of 0.100 M KF?

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