Question: A 1.0 M Na2SO4 solution is slowly added to 10.0 mL of a solution that is 0.20 M in Ca2+ and 0.30 M in Ag+.

A 1.0 M Na2SO4 solution is slowly added to 10.0 mL of a solution that is 0.20 M in Ca2+ and 0.30 M in Ag+.
(a) Which compound will precipitate first: CaSO4 (Ksp = 2.4 x 10-5) or Ag2SO4(Ksp = 1.5 x 10-5) ?
(b) How much Na2SO4 solution must be added to initiate the precipitation?

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