BaSO3↓ + H2SO4 -> BaSO4↓ + SO2↑ + H2O — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Barium sulfite, BaSO3↓, is an insoluble precipitate. Step 2: Addition of sulfuric acid (H2SO4) leads to a reaction where the sulfite group is replaced by the sulfate group to form the even more insoluble barium sulfate precipitate, BaSO4↓, releasing sulfur dioxide gas (SO2↑). Step 3: Since one insoluble solid precipitate (BaSO3↓) is replaced by another solid precipitate (BaSO4↓), this represents a precipitate exchange reaction (type C), matching option (c).