5. Identify whether the following reaction is an oxidation or a reduction.

Question

a. Ni2+ + 2e- �¨ Ni
b. 2Br- �¨ Br2 + 2e-
c. O2 + 4e- �¨ 2O2-
d. Zn �¨ 2e- + Zn2+
e. H2 �¨ 2H+ + 2e-

Answer 1

See your post above for definitions of oxidation and reduction.