PCl3 + H2O -> H3PO3 + HCl — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Phosphorus trichloride (PCl3) contains phosphorus in the +3 oxidation state. Step 2: Complete hydrolysis replaces all three chlorine atoms to produce phosphorous acid (H3PO3) and hydrochloric acid (HCl). Step 3: Because the phosphorus-containing product is phosphorous acid, which ends in the '-ous' suffix, it is classified as category B.