Question

Help with Redox Reaction

Answer 1

Question: Balance in both acidic and basic media:
\[CuF _{2} + NH _{3} -> Cu _{3}N + NH _{4} + N_{2}\]

Answer 2

Oxidation states...
\[CuF _{2}\]
Cu: 2+ F: 1-

\[NH _{3}\]
N: 3- H: 1+

\[Cu_{3}N\]
Cu: 1+ N: 3-

\[NH_{4}F\]
N:3- H:1+ F: 1-

N2 = 0

Answer 3

Try following this list

Redox reactions: Half-cell method

1a. Assign oxidation states/numbers
2a. Separate (re-write) oxidation/reduction half-cell reactions

To individual half-cell reaction:
1b. Balance elements (ignore H and O; these are balanced with \(H_2O\) later)
2b. Balance electrons transferred (i.e. change coeffients)
3b. Balance charges with: \(\color{blue}{OH^-~in~base}\) or \(\color{red}{H_3O^+~in~acid}\)
4b. Balance H’s and O’s with \(H_2O\)
5b. Recombine half-reactions and cancel out redundancies.