Homework Help: Chemistry

Posted by Anonymous on Saturday, October 4, 2008 at 8:21pm.

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 - GK, Saturday, October 4, 2008 at 9:22pm
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 - Anonymous, Saturday, October 4, 2008 at 10:16pm
I see. TY.

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