This 11-page PDF document is part of an environmental geochemistry course taught by Dr. David Sherman at the University of Bristol. Topics include the formation of insoluble carbonates, sulfates, sulfides and hydroxides from +2 and +3 cations, solubility expression (congruent vs. incongruent), and the common ion effect. Also discussed are the effects of solid solution and pH dependence of hydroxide and sulfide and carbonate solubilities. Informative diagrams augment the text.