Question

To facilitate the electrolysis of water we add a few drops of acids like sullphuric acid or salts like NaCl. Because:

Answer 1

Because water is an insulator. 100% pure water doesn't conduct electricity very well at all. When acid such as sulfuric acid (H2SO4) is added, the compounds separate into separate ions and having that small number of ions increases conductivity astronomically. This doesn't require an acid, you can use a base or almost any compound. Even normal tap water has enough ions to be a good conductor, which is necessary to efficiently perform electrolysis

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Answer 2

To increase the conductivity of water a few drops of sulphuric acid is added . Being a strong acid it can ionize completely to release H+ ions. These H+ ions are responsible for the conduction of electricity. To carry out electrolysis in water,a few drops of sulphuric acid is added to the water.