Question

State giving reasons which is a stronger acid – dil. HCl or cone. H₂CO₃ . 

Answer 1

Dil. HCl is a stronger acid than cone. H₂CO₃ 

Reason:  HCl ionises almost completely in aqueous solution thereby producing a high concentration of Hp ions in aqueous solution. On the other hand, H₂CO₃ ionises to a very small extent producing a low concentration of HO⁺ ions. More the concentration of H₃O⁺ ions in solution, stronger is the acid. Hence dil. HCl is a stronger acid than cone. H₂CO_{3 .}