For the half equation: Al 3+ + 3e-→ Al, this is described as a reduction reaction as aluminium ions are gaining electrons and the gain of electrons is reduction.

oxidation is the loss of electrons reduction is the gain of electrons Balance the half equation for the formation of aluminium during electrolysis: Al 3+ + e-→ Al. The balanced half equation is: ...

The spontaneity of redox reactions is demonstrated using copper, zinc, and silver, and their cations. When solid zinc is placed in Cu2+ solution, the blue color of the solution becomes less intense as ...