Which of the following is a reduction half-reaction? (1) Cu2+ + e- → Cu+ (2) Cu+ + e- → Cu0 (3) Fe2+ → Fe3+ + e-
(A)1 only because copper(II) ions are reduced (B)3 only because the iron is reduced (C)1 and 2 because they both reduce copper ions (D)1 and 3 because they do not have insoluble ions
C