Question

Identify the following (some are half reactions) as involving either oxidation or reduction or neither:

a) Mg (s)  Mg2+(aq) +2e-

b) O2 (g) + 2H2O (l) + 4e-  4OH- (aq)

c) Cu2+(aq) + 2e-  Cu(s)

d) Fe(s)  Fe2+ (aq) + 2e- ​

Answer 1

A) 0 to +2 oxidation
B) reduction
C) reduction
D) oxidation