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April 17, 2015

Homework Help: Chemistry -Please Help

Posted by cassie on Friday, March 22, 2013 at 1:39pm.

2. What is the reduction half-reaction for the following unbalanced redox equation?
Cr2O7^2 + NH4^+ Cr2O3 + N2

A.) Cr2O3 -> Cr2O7^2
B.) Cr2O7^2 -> Cr2O3
C.) NH4^+ -> N2
D.) N2 -> NH4^+
I think it is B...?

3. Which oxidation-reduction reactions are best balanced by the half-reaction method?

A.) covalent reactions
B.) acid-base reactions
C.) ionic reactions
D.) intermolecular reactions
I think it is C....?

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