What is observed when sulphur dioxide is passed through (i) water? (ii) lime water? Also write chemical equations for the reactions that takes place.
(i) When SO2 is passed through water, sulphurous acid is formed. The aqueous solution of SO2 turns blue litmus red.
(ii) But when SO2 is passed through lime water, calcium sulphite (white ppt.) is formed, which reacts with excess SO2 to form calcium hydrogen sulphite.
The chemical equation for the reactions are:
at what temperature does SO2 reacts with water. How about passing SO2 gas into water???