0Electrochemistry:
Introduction: Electrochemistry is a branch of chemistry which deals with the study of interconvertion of Electrical energy into chemical energy and vice varsa. Interconvertion of energies takes place through a redox reaction.
Electrochemical Cells: Electrochemical Cell is a device which converts chemical energy into electrical energy and electrical energy into chemical energy.
Types of Electrochemical Cell: There are two types of electrochemical cell.
i) Galvanic Cell: - A Galvanic cell is a device in which the chemical energy is converted into electrical energy. Ex: Dry cell, Pb-Acid cell, Ni-Cd cell etc…
ii) Electrolytic Cell: - It is a device in which electrical energy is converted into chemical energy. Ex: Nelson’s cell, Down’s cell etc….
Construction of Galvanic Cell:- A Daniel cell is an example of galvanic cell. It consists of two container , one which is with a Zinc rod dipped in Zinc Sulphate solution. The other hand with a Copper rod dipped in Copper Sulphate solution and each electrode is known as half cell. These two electrodes are connected internally by Salt bridge and externally connected through a voltmeter using metallic wire. The Daniel cell is based on the Redox reaction.
