February 20, 2017

Homework Help: Chemistry: check answers

Posted by Jack on Friday, March 22, 2013 at 6:12pm.

Please check. Thank you.

What is the reduction half-reaction for the following unbalanced redox equation?
Cr2O72– + NH4+ Cr2O3 + N2

A.) Cr2O3 -> Cr2O72–
B.) Cr2O72– -> Cr2O3
C.) NH4+ -> N2
D.) N2 -> NH4+

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

Thank You.

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