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DISCUSS ELECTROLYSIS ACTIVITY WITH SUITABLE DIAGRAM *
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Answer:
This chemical change is called electrolysis. The electrolyte and the electrodes used in electrolysis form an electrolytic cell. When electricity passes through an electrolyte, the positive ions of the electrolyte move towards the cathode (negative electrode), where they gain electrons to become a neutral substance.
Electrolysis of water is the decomposition of water (H
2
O) into oxygen (O
2
) and hydrogen gas (H
2
) due to an electric current being passed through the water.
An electrical power source is connected to two electrodes, or two plates (typically made from some inert metal such as platinum, stainless steel or iridium) which are placed in the water. Hydrogen will appear at the cathode (the negatively charged electrode, where electrons enter the water), and oxygen will appear at the anode (the positively charged electrode). Assuming ideal faradaic efficiency, the amount of hydrogen generated is twice the amount of oxygen, and both are proportional to the total electrical charge conducted by the solution.
Above is the simple setup for electrolysis of water.