Question

Acidified water is used for electrolysis of water. Why doesn't the acid used get separated into its constituents during the process?

Answer 1

Acidified water is used for electrolysis of water because it increases the efficiency of electrolysis. Strong acid used in electrolysis are called as electrolyte. Like sulphuric acid H₂SO₄ when added in water it gets separated into its constitute ions as
H₂SO₄ $\to$ 2H⁺ + SO₄^2-

Ions (2H⁺ & SO₄^2-) are charged species which have high conducting abilities. Thus they increases rate of electrolysis.