In a process called anodizing, tumblers of silvery-colored aluminum are coated in bright c...

In a process called anodizing, tumblers of silvery-colored aluminum are coated in bright colors. The aluminum anode is oxidized to form an oxide coating. When dyes are added, they attach to the coating to produce tumblers with bright colors. At the cathode, hydrogen gas is produced.

a. Balance the half-reaction in acidic solution at the abode:

b. Balance the half-reaction in acidic solution at the cathode:

c. Write the overall reaction for the formation of the aluminum-oxide coating.