Question

What are the products of auto-protolysis of water?

• A. $H_2$ and $O_2$
• B. Steam
• C. $H_3{O}^{+}$ and $O{H}^{-}$
• D. Hydrogen peroxide

Answer 1

The correct option is C $H_3{O}^{+}$ and $O{H}^{-}$

The self ionization of water molecules takes place to produce hydronium ion and hydroxide ion is known as auto-pyrolysis of water.

H₂O (l) + H₂O (l) ⇌ H₃O⁺ (aq) + OH⁻ (aq).

In this reaction, one of the water molecules acts as an acid and the other acts as a base.

Thus, option C is correct.