Challenge Problem: (a) The solubility of CdS is normally very low, but it can be increased by lowering the solution pH. Calculate the molar solubility of CdS as a function of pH from pH 11 to pH 1. Find values at every 0.5pH unit and plot solubility versus pH. (b) A solution contains 1104M of both Fe2+ and Cd2+. Sulfide ions are slowly added to this solution to precipitare either FeS or CdS. Determine which ion Challenge Problem: (a) The solubility of CdS is normally very low, but it can be increased by lowering the solution pH. Calculate the molar solubility of CdS as a function of pH from pH 11 to pH 1. Find values at every 0.5pH unit and plot solubility versus pH. (b) A solution contains 1104M of both Fe2+ and Cd2+. Sulfide ions are slowly added to this solution to precipitare either FeS or CdS. Determine which ion