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Balence reactions

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Thanks for your response on the oxidation reduction it was helpful, but how do you balance equations without oxygen?
such as Cu2+Fe------->Cu+Fe2
I started out with Cu2-->Cu
and on the oxidation side Fe-->Fe2+
and what about this one?
Sn2+2Fe)3+----Sn)4+ 2Fe)2+

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Solution Summary

It shows how to balance the chemical reaction.

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You are correct! You want to start with the half reactions.

Cu2+ --> 2Cu

Start by balancing mass. So we need a 2 on the left:

2Cu2+ --> 2Cu

Now balance charge. We need ...

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