1. Hydrolysis of magnesium chloride, aluminum chloride, and silicon tetrachloride with water, forming hydroxides and oxides. 2. Chloride ion titration in meat products with silver nitrate, mole calculations, and ionic equations for sodium and potassium chlorides. 3. Iodination of benzene, enthalpy change calculations for iodine formation, and oxidation state changes in iodine and nitrogen. 4. Nitrogen oxides catalyzing acid rain formation, explained through reaction mechanisms. 5. Cu²⁺ electronic configuration, d-orbital splitting in transition metal complexes, and ammonia's effect on copper solution color. 6. Curcumin structure, functional group analysis, and reactions with bromine and KMnO₄ to identify products.