Question

How is the oxidation of aluminum metal by acid, hydrogen ion, represented?

Answer 1

Aluminum is oxidized............

Explanation:

`Al(s) rarr Al^(3+) + 3e^(-)` `(i)`

And hydrogen ion is reduced............

`H^(+) + e^(-) rarr 1/2H_2(g)` `(ii)`

And we can cross multiply the individual redox reactions to remove the electrons, which are conceptual particles, i.e. `(i)+3xx(ii)`:

`Al(s) +3H^(+) rarr Al^(3+) + 3/2H_2(g)`