1. Hydrolysis reactions of magnesium chloride, aluminum chloride, and silicon tetrachloride with water, producing hydroxides and oxides. 2. Chloride ion quantification in meat products via silver nitrate titration, 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 chemical reactions. 5. Cu²⁺ electronic configuration, d-orbital splitting, and ammonia’s effect on copper solution color. 6. Curcumin structure, functional group analysis, and reactions with bromine and KMnO₄ for product identification.