Question

201. Write a brief account of Arrhenius theory of acids and bases.

Answer 1

• According to Arrhenius's theory, a substance that generates H⁺ or hydronium ions in an aqueous solution, is called an acid.
• For example, Hydrochloric acid produces H⁺ and Cl^- ions in water and is termed Arrhenius acid.
• Arrhenius acids increase the concentration of H⁺ ions in an aqueous solution.
• According to Arrhenius's theory, a substance that generates OH^- or hydroxide ions in an aqueous solution, is called a base.
• For example, Sodium hydroxide will produce hydroxide ions in water and is termed as Arrhenius base.
• Arrhenius bases increase the concentration of OH^- ions in an aqueous solution.