Posted by MARY on Saturday, November 24, 2012 at 2:46pm.
Where do you start? By assigning oxidation numbers to each of the elements to determine which have changed. Here is a hint to get you started. Cr changes from +6 for EACH Cr on the left to +3 on the right. Cu changes from zero on the left to +2 on the right.
You need to learn to do these redox equations yourself. Here is a site that tells you almost anything you want to know about redox equation.
http://www.chemteam.info/Redox/Redox.html
If you have specific questions as you go through I'll be more than happy to help you through.
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