Core Reactions: Redox

Core Reactions: Redox

Slide 21 of 42

Redox Reaction: Definition

So, redox therefore involves two half processes: reduction and oxidation

–Reduction on the other hand is the other half in which electrons are gained, which results in a decrease in the oxidation state.

–Oxidation is part of the reaction where loss of electron(s) occurs, which results in an increase in oxidation state.

A mnemonic that might help you to remember redox in terms of electron exchange is to remember the word OILRIG.

–Oxidation Is Loss (of electrons); Reduction Is Gain.

In terms of oxidation state change, reduction is reduction in oxidation state, ie. going from a positive to a less positive state or positive to negative state, or a negative to a more negative state.