Question

The information below describes a redox reaction.

3 equations: First: upper A g superscript plus (a q) plus upper A l (s) right arrow upper A g (s) plus upper A l superscript 3 plus (a q). Second: upper A G superscript plus (a q) plus e superscript minus right arrow upper A g (s). Third: upper A l (s) right arrow upper A l Superscript 3 plus (a q) plus 3 e superscript minus.

What is the coefficient of silver in the final, balanced equation for this reaction?
1
2
3
4

Answer 1

3

Multiply the silver half-reaction by 3 so the electrons cancel:
3 Ag+ + 3 e- → 3 Ag(s)
Al(s) → Al3+ + 3 e-
Combined: 3 Ag+ + Al(s) → 3 Ag(s) + Al3+