1. Hydrolysis of magnesium chloride, aluminum chloride, and silicon tetrachloride with water, forming hydroxides and oxides. 2. Chloride titration in meat products using silver nitrate, mole calculations, and ionic equations for sodium and potassium chlorides. 3. Iodination of benzene, enthalpy calculations for iodine, and oxidation state changes in iodine and nitrogen. 4. Nitrogen oxide catalysis in acid rain formation, with reaction mechanisms and oxidation states. 5. Cu²⁺ electronic configuration, orbital splitting in transition metal complexes, and ammonia's effect on copper solutions. 6. Curcumin structure and functional group reactions with bromine and KMnO₄, product identification.