3. Traces of heavy metals, such as Cu+ and Pb2+, in water bodies can be separated through fractional precipitation A research work investigates the use of NaOH) in separating these two ions in a 1.00 L of water sample that contains 12.70 mg Cur- (MM= 63.546 g/mol) and 39.90 mg Pb2+ (MM= 399.32 g/mol). Given: Hydroxide of 2.20 x 10-20 1.20 x 10-15 Cu2+ Pb2+ A Write the balanced chemical equation and the corresponding Kip expression for the dissolution of the hydroxide salt of (a) Cuand of (6) Pb in water. B. Calculate the molar solubility of the hydroxide salt of (a) Cu* and (b) Pb2+ in water. If NaOHaq) is added gradually to the water sample, which of the two ions is more likely to precipitate first? Explain your answer. C. Calculate the initial molar concentration of each of the heavy metal ions in the water sample. D. Calculate the equilibrium concentration of NaOH(aq) that must be exceeded to initiate the precipitation of the less soluble metal hydroxide. E. How much of the first metal ion is left in the solution when the second ion starts to precipitate? Express your answer in percentage (%)