Is it necessary for SO2 gas to get dissolved first to react with water?

in scrubbing process, how does the reaction occur? scrubbing agent is CaO and water. If water dissolves all SO2, then , why is CaO used? or:in scrubb

in scrubbing process, how does the reaction occur? scrubbing agent is CaO and water. If water dissolves all SO2, then , why is CaO used?

or:in scrubbing process, how does the reaction occur? scrubbing agent is CaO and water. If water dissolves all SO2, then , why is CaO used?

or:SO2 ionizes in water to form H2SO3, sulfurous acid. This can then be neutralized with CaO. Without water there is no reaction.

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