Redox

Redox

1. Oxidation

   • Gain of Oxygen
   • Loss of Hydrogen
   • Removal of electrons

2. Reduction

   • Loss of Oxygen
   • Gain of Hydrogen
   • Gain of electrons

3. Rules for assigning oxidation numbers

   • The oxidation number for an element in its elemental form is 0
   • The oxidation number of a monatomic ion is equal to the charge on the ion
   • The sum of all the oxidation numbers in a compound is 0
   • For polyatomic ions the sum of all the oxidation numbers must be equal to the charge on the ion
   • Oxygen has an oxidation number of -2 except when bonded to fluorine when its +2 and in peroxides when is is -1
   • Hydrogen has an oxidation number of +1 except when bonded to metals in hydrides when it is -1