Question

When one substrate gains or loses electrons, another substance must donate or accept those electrons.

In a redox pair, the substrate that donates electrons is a _.
The substrate that gains electrons is an _

Answer 1

In redox reactions, the reductant donates electrons and is oxidized, while the oxidant gains electrons and is reduced.

Step-by-step explanation:

In any electrochemical process, electrons flow from one chemical substance to another, driven by an oxidation-reduction (redox) reaction. A redox reaction occurs when electrons are transferred from a substance that is oxidized to one that is being reduced. The reductant is the substance that loses electrons and is oxidized in the process; the oxidant is the species that gains electrons and is reduced in the process.