Redox

• Oxidation is the loss of electrons
• Reduction is the gain of electrons
• The oxidising agent is the substance that accepts electrons from another substance during an oxidation reaction.
• The reducing agent is the substance that donates electrons to another substance during a reduction reaction.
• How to write the oxidation number of a molecule?

  write the charge first + or - and then the magnitude
• When combining half equation you must ensure that the amount of electrons are equal on both sides of the reaction
• Potassium manganate appears as?

  K2MnO4
• Sodium thiosulfate appears as?

  Na2S2O3