BaSO4(s) ⇌ Ba2+(aq) + SO42-(aq); Ksp = 2.25 x 10^-10
Na2SO4 (Na+ + SO42-) is added to the equilibrium system shown above, increasing the concentration of SO42- in the equilibrium mixture to 0.0150 M.
(a) Through a consideration of Le Chatelier's Principle, how will the solubility of BaSO4 be affected by the addition of Na2SO4? Assume that no change in volume results from the addition.
(b) Calculate the solubility of BaSO4 in a 0.015 M aqueous solution of Na2SO4, that is, in a solution where the initial concentration of SO42- is 0.015 M.