Question

What happens when electric current is passed through water? Why do we add a small amount of salt or

acid to water before it is electrolyzed?​

Answer 1

Answer:

When electric current is passed through water, water dissociates into hydrogen and oxygen. Hydrogen is deposited over negative pole and oxygen is deposited over positive pole. Deposition of hydrogen and oxygen at different poles is visible in the form of bubbles.

Water is a poor conductor of electrcity. ... Addition of a few drops of sulphuric acid (H2SO4) makes water conducting in nature because the acid ionises in water to release H+ ions and HSO-4 ions.

Answer 2

Answer with Explaination:

a) When electric current is passed through water, water dissociates into hydrogen and oxygen. Hydrogen is deposited over negative pole and oxygen is deposited over positive pole. Deposition of hydrogen and oxygen at different poles is visible in the form of bubbles.

b) Adding an acid makes the water conduct electricity. Assuming that distilled water is being in the experiment, which is a non conductor of electricity we need to make the water conduct electricity for electrolysis to occur. Hence the acid is added.

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