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Chemistry

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I'm supposed to balance a redox reaction that occurs in an acidic solution.
I already balanced it(h**p://img148.imageshack.us/img148/4304/redoxht8.jpg), but how do I tell if a half-reaction is oxidation or reduction? I know an oxidation reaction loses electrons, and an reduction reaction gains electrons, but how do I tell from the reaction?

  • Chemistry -

    If electrons are added to the left side of the half reaction, it is a reduction. In the reaction you are referring to, ClO3- is reduced and As2S3 is oxidized.

  • Chemistry -

    I see. TY.

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