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    Hey i does anyone know how sodium metabisulphite reacts with water. I could really use the help, for my chemistry report. My initial thoughts were that it would dissociate in solution to sulphur dioxide, a sulfate ion and sodium ions.
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    yes. That's correct. Na2S2O5 releases SO2 when added to water. It's used to disinfect containers in the food industry

    Na_2S_2O_5 + H_2O \rightleftharpoons 2Na^+ + 2 HSO_3^-

    HSO_3^- + H^+ \rightleftharpoons SO_2 + H_2O
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    Hi,
    Regard to sodium metabisulfite reaction with water, I need to know please if we have 70g of the salt and solve it in 9L water what would be sulfite concentration in mg/L?
 
 
 
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