How to balance the eqn Fe3+ + Zn-> Zn2+ + Fe2+?

Question

How to balance the eqn Fe3+ + Zn-> Zn2+ + Fe2+?

Answer 1

2Fe3 + 2Zn -> Zn2 + 3Fe2

Answer 2

2Fe3+ &  1 Zn  -> 1 Zn2+ & 2 Fe2+

because when:

Zn -->  Zn+2 (loses two electrons in its oxidation,)

we need two electrns to be taken, however:

1 Fe+3 takes 1 electron --> Fe+2  (in its reduction)

so we double the iron  to  have 2 e- taken matching the 2 e- lost:

1 Zn -->  1 Zn+2 & 2e-

2 Fe+3  & 2 e--->2 Fe+2

& then combine the two1/2 reactions as:

2Fe3+ &  1 Zn  -> 1 Zn2+ & 2 Fe2+