This episode clarifies the fundamental concepts of redox reactions, which involve both oxidation and reduction processes. 

Initially defined by the gain and loss of oxygen, these terms are further explained through the transfer of electrons. Specifically, oxidation is characterised by the loss of electrons, while reduction involves the gain of electrons. 

A helpful mnemonic, OIL RIG (Oxidation Is Loss, Reduction Is Gain), is introduced as a memory aid for understanding these electron transfers. 

Therefore, the episode succinctly outlines the dual nature of redox reactions and offers a practical method for remembering the electron movements associated with each half-reaction.

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