In: Chemistry
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?