Electrochemical cell

  Wo rking of  Galvanic  Cell In a galvanic cell, when an electrode is exposed to the electrolyte at the electrode-electrolyte interface, the atoms of the metal electrode have a tendency to generate ions in the electrolyte solution leaving behind the electrons at the electrode. Thus, making the metal electrode negatively charged. While at the same time metal ions in the electrolyte solution too, have a tendency to deposit on a metal electrode. Thus, making the electrode positively charged. Under equilibrium condition, charge separation is observed and depending on the tendencies of two opposing reactions, the electrode can be positively or negatively charged. Hence, a potential difference is developed between the electrode and electrolyte. This potential difference is known as electrode potential. Out of two electrodes, the electrode at which oxidation takes place is called anode while the electrode at which reduction takes place is called cathode. The anode has a negativ...