An industrial plant processes its waste water through a sedimentation tank that removes hazardous metals by precipitating them as insoluble carbonate salts. if sodium carbonate is gradually added to the tank, what would be the order of precipitation of the metals, pb2+, cu2+, hg22+, and zn2+ if each is ≈ 1.0 × 10–4 m? ( ksp pbco3 = 7.4 × 10–14, ksp cuco3 = 1.4 × 10–10, ksp hg2co3 = 8.9 × 10–17, and ksp znco3 = 1.4 × 10–11)