Question

What is oxidized and what is reduced in this reaction?

Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + 2Ag(s)

Cu is reduced and Ag is oxidized.

Ag is reduced and Cu is oxidized.

NO3 is oxidized and Cu is reduced.

Ag is oxidized and NO3 is reduced.

Answer 1

Ag is reduced and Cu is oxidized.

Explanation: Cu(s) → Cu2+ + 2e− (oxidation) and 2Ag+ + 2e− → 2Ag(s) (reduction). NO3− is a spectator ion.