For acidic solutions, which element is added to balance half-reactions?

A.

hydrogen

B.

hydroxide

C.

oxygen

D.

nitrogen

We add A Hydrogen

Explanation:

When we have a half-reaction in an acidic media usually we add (H+) hydrogen plus or protons to the reaction to balance in both sides of the reaction the amount of hydrogen.

After this step the next one is equilibrate the charges (e-) and finally we add the two half-reactions to write a short version