The Ksp of Fe(OH)3 is 2.8 x 10--39, and the Ksp of Sr(OH)2 is 3.2 x 10-4.
a) Can Fe3+ be separated from Sr2+ by the addition of an NaOH solution to an acidic solution that contains 0.450 M Sr2+ and 0.070 M Fe3+? Assume that the initial concentration of OH-- is zero for these calculations.
b) At what hydroxide ion concentration will the second cation precipitate? (i.e. the cation of the more soluble salt.) This was calculated in part (a).
c) What is the concentration of the less soluble cation at the hydroxide ion concentrationin (b)?