Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2

Question

MnO4– + Fe2+ Mn2+ + Fe3+ ?

A. The presence of K+ would result in a net positive charge in the products.
B. The equations cannot be balanced if the potassium ion K+ is present.
C. KMnO4 is not added to either reaction.
D. K+ is a spectator ion and redox reactions are written as net ionic reactions.
E. None of these.

Answer 1

answer is d.

i already figured it myself, just wanted to share.

Answer 2

thanks