What are half cell reactions? Explain.
An electrons cell is made up of two half cells in each of which a half-reaction takes place. The half reaction taking place in each half cell is known as half cell reaction. A half cell reaction in which electrons are released or oxidation occurs is called oxidation half cell reaction and the one in which electrons are accepted or reduction occurs is called reduction half-cell reaction, e.g. in Daniell cell, two half reactions taking place are:
(i) Oxidation half cell reaction (Anode reaction):
(ii) Reduction half cell reaction (Cathode reaction):
Give the points of difference between a redox reaction occurring in a beaker and in a cell ?