Add H+ or OH-

[Joanne Guan 1B]

In Example 14.1 in the book, the solution adds H⁺ to balance the extra H⁺ from the H₂O. In Example 14.2, the solution adds OH^- instead. How do you know whether to add H⁺ or OH^-?

[Virpal Gill 1B]

14.1 was in an acidic solution while 14.2 was in a basic solution, so you have to know whether it is an acidic or basic solution when doing the problem.

[Jiun Yue Chung 2I]

You add H+ ions to redox reactions in acidic solution and OH- ions to redox reactions in basic solutions.