Electrochemical Reactions

• Galvanic cell


  Define the galvanic cell as a cell in which chemical energy is converted to electrical energy.
• Describe a redox (oxidation-reduction) In terms of electrons

  Describe a redox (oxidation-reduction) reaction as involving an electron transfer
• Describe a redox reaction in terms of oxidation no.s


  (oxidation-reduction) reaction as always involving changes in oxidation numbers
• Define oxidation and reduction in terms of electron (e-) transfer


  Oxidation is a loss of electrons. Reduction is a gain of electrons.
• Define oxidation and reduction in terms of oxidation numbers

  Oxidation: an increase in oxidation number.

  Reduction: a decrease in oxidation number.
• Define an oxidising agent and a reducing agent in terms of oxidation and reduction


  Oxidising agent: a substance that is reduced/gains electrons. Reducing agent: a substance that is oxidised/loses electrons.
• Define an anode and a cathode in terms of oxidation and reduction


  Anode: the electrode where oxidation takes place. Cathode: the electrode where reduction takes place.
• Eectrolyte

  Define an electrolyte as a substance of which the aqueous solution contains ions OR a substance that dissolves in water to give a solution that conducts electricity
• Electrolytic cell


  Define the electrolytic cell as a cell in which electrical energy is converted into chemical energy. Electrolysis: The chemical process in which electrical energy is converted to chemical energy