Use the half reaction method to balance the following equation in acidic solutio

Question

Use the half reaction method to balance the following equation in acidic solution. It is not necessary to include any phases of matter for any species. It is not necessary to include any phases of matter for any species.

CN- + MnO4- --> CNO- + MnO2

Balance the following skeleton reaction. Include states of matter in your answer. These are also balanced using the half reaction method.

(a) Zn(s) + NO3-(aq) --> Zn2+(aq) + N2(g)

(b) Cl2(g) + Fe2+(aq) --> Cl-(aq) + Fe3+(aq)

Include answers, I've worked through these many times using outlines of the methods to do them online and in the book and they still coming up wrong. This is a McGraw Hill connect question.

Explanation / Answer

the rules are:
1. Separate the reaction into oxidation 1/2 and redx 1/2
2. Balance for mass all elements except H2O
3. Balance H atoms using H+
5. Balance charges using e-
6. multiply each 1/2 by a whole number to cancel out the # of e.
7. Add the 2 1/2 reactions
8. Cancel spectator ions

CN- + H2O >> CNO- + 2H+ + 2e-) x3
MnO4-+ 4H+ + 3e- >> MnO2 + 2 H2O) x2
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