Question

why in water electrilysis,H2SO4 is used instead of HCl or HNO3?​

Answer 1

Answer:

In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification because HNO3 is volatile.

Answer 2

the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification because HNO3 is volatile. ______________________Pure water or distilled water is a poor electrical conductor because there are few ions in it; pH of pure water is 7 therefore it only 10⁻⁷ mol/L of H⁺ and same concentration of OH⁻.

For Electrolysis process freely flowing ion is required for passing current.

Water acidified with sulfuric acid contains H+ ions, water molecules and

sulfate ions. In the electrolysis of acidified water.

Acidified water is used for two reasons. Firstly, the ions provided by the acid greatly increase the electrical conductivity of the water, and this allows the decomposition of water to occur at a much increased rate. Secondly, the acid provides H+ions, which react, forming hydrogen, at the cathode. An equivalent amount of H+ ions is formed at the anode, and, as a result, the acid is not consumed.