Dissolution:precipitation equilibria

This lecture covers the equilibrium between dissolution and precipitation reactions in water, focusing on calcite, silica, and aluminosilicates. It discusses the role of various aqueous species, activities, and saturation conditions. The lecture also explores the impact of water hardness, calcite oversaturation, and the formation of phytoliths from nano SiO2. Additionally, it delves into the solubility of clay minerals like kaolinite and the differences in solubility between amorphous and crystalline forms of solids. The presentation concludes with insights on the independence of silica solubility on pH and the contrasting solubilities of gibbsite and Fe(OH)3 in alkaline media.