Mammoth Memory

Oxidation and reduction

Because we now know that:

  • Cathodes give out electrons
  • Anodes take electrons

 

And because:

  • Loss of electrons is oxidation 
  • Gain of electrons is reduction

 

(Remember OIL RIG – Oxidation is loss, reduction is gain) 

 

Reduction (of cations, e.g. H+) takes place at the cathode

OIL RIG is an acronym to remember Oxidation is Loss and Reduction is Gained Reduction takes place at the cathode oxidation takes place at the anode
Imagine that a red duck shone (reduction) a light on the cathedral (cathode).

 

Therefore oxidation (of anions, e.g. Cl-) takes place at the anode.

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