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April 18, 2014

Homework Help: Chemistry

Posted by Joanne on Sunday, June 5, 2011 at 4:35pm.

Balance the equation in aqueous basic solution:
As2S3(s) + H2O2(aq) → AsO43-(aq) + SO42-(aq)

I normally understand how to balance redox equations, but this one confuses me because I would normally think that the As2S3 is being reduced to AsO4^3-, but since the As2S3 has a "S", do i also include the SO4^2-? but even when i do that, and try to balance the electrons for the half rxn, it seems to change into oxidation... I'm really confused!

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