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OpenStudy (anonymous):
Sulfur dioxide is used as a preservative in wine making. The following equations describe how sulfur dioxide dissolves. H2O + SO2 HSO3 – + H+ HSO3 – + H+ SO3 2– + 2H+ Which statement about these two reactions is correct? A HSO3 – acts as a base. B SO2 acts as an oxidising agent. C SO3 2– acts as an acid. D SO3 2– acts as a reducing agent. why is the answer a?
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