What is the chemical equation when sulfur oxide reacts with sodium hydroxide?

Answer 1

Addition of hydrochloric acid to solid sodium sulfite produces sulfur dioxide gas, which is collected in a beaker.When a red rose is placed in a beaker of SO2 gas, the color gradually fades. When a purple permanganate solution is poured into the gas, a nearly colorless Mn2+ solution results. SO2 gas reduces yellow chromate ion to the green Cr3+. Sulfur dioxide reacts with a soda lime mixture. As the gas is consumed, a rubber dam covering the top of the beaker is pushed inward by atmospheric pressure.Na2SO3(s ) + 2 HCl(aq ) --> 2 NaCl(s ) + SO2(g ) + H2O(l )5 SO2(g ) + 2 MnO4-(aq ) + 2 H2O(l ) --> 5 SO42-(aq ) + 2 Mn2+(aq ) + 4 H+(aq )3 SO2(g ) + 2 CrO42-(aq ) + 2 H 2O(l ) --> 3 SO42-(aq ) + 2 Cr3+(aq ) + 4 OH-(aq )CaO(s ) + SO2(g ) --> CaSO3(s )