Question

Why must the number of electrons lost equal the number of electrons gained in every redox reaction? Use 4 – 5 sentences to address this question.

Answer 1

That is the energy BALANCE.

Explanation:

It would be a different type or reaction if the exchange was not balanced, or if no exchange took place.
In Oxidation-Reduction, the balance of energy (electrons) in the reaction must be maintained between the oxidizer and the reducer.