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Question

Explain electrolysis when current is passes through the given electrolyte.


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Solution

Electrolysis:

  • Electrolysis is a process by which electrical energy is used to produce a chemical change.
  • The electrolysis cell consists of two metallic rods known as electrodes that are connected to a battery and dipped into molten electrolyte or electrolyte solution.
  • The electrode connected to the positive side of the battery is called the anode.
  • The electrode connected to the negative side of the battery is called the cathode.

Electrolysis on passing current:

  • On passing current, the electrically charged cations and anions present in the electrolyte move towards the respective electrodes.
  • The positively charged cations move toward the cathode and negatively charged anions move towards the anode.
  • When the anions reach the anode, oxidation takes place, liberating neutral atoms or molecules at the electrode.
  • When cations reach the cathode, reduction takes place, they are neutralized through electron addition.

Thus, on passing electricity, dissociation of ions takes place in the solution.


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