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What is the main purpose of adding a few drops of dilute sulphuric acid during the electrolysis of water?

Answer and explanation

Correct answer: To increase the low electrical conductivity of pure water

Pure water contains very few ions, so it conducts electricity poorly and electrolysis proceeds very slowly. Adding dilute sulphuric acid supplies \(\mathrm{H^+}\) and other ions, increasing the electrical conductivity of the solution so that current can pass. The acid is added to improve conduction, not to increase the amount of oxygen produced.

Related tags

ScienceClass 10Chemical ReactionsElectrolysis Of WaterElectrical ConductivityIons

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