IGNOU BCHCT 133 2026 - Explain the effect of common ion on the ionization equilibrium o

Question

Explain the effect of common ion on the ionization equilibrium of weak acids with the help of a suitable example.

19 Jan 2026

Answer :

Word Count : 371

The common ion effect refers to the suppression of ionization of a weak electrolyte when a strong electrolyte containing a common ion is added to its solution. This effect can be explained on the basis of the law of mass action and Le Chatelier’s principle, which states that when a system at equilibrium is disturbed, it adjusts itself to counteract the disturbance. Consider a weak acid such as acetic acid (CH₃COOH) in aqueous solution. It ionizes partially as CH₃COOH ⇌ H⁺ + CH₃COO⁻ Let the initial concentration of acetic acid be 0.1 M.

_________ _______ ________ _____ _____ _________ __________ _________ ______.
______ ___ _______ _____ ________ ___ ___.
________ ___ __________ _______ _______ _______.
________ ______ _________ ____ __________ ______ ________ _________ _________ ____ ________.
_______ ____ ____ ________ ___ _____ _________ ____.
__________ _______ ________ ___ ________ ________ ______ ________ _________ _____ _______.
__________ ____ ______ ________ ___ _____ ____ _________ ____.
_________ __________ ________ _______ ________ ______ _________ _______ __________ ____ _________.
__________ _____ _______ __________ ___ _____ ____.
_______ _____ ____ ________ __________ ___ ________.
_________ _____ ______ ________ _______ ____ _____ __________.
_____ ____ ______ ____ ________ _____ _____ _________ __________ ________ _____.
______ _______ _____ ____ ___ ________ ________ _________ ____ _____ _______ __________.
____ ____ ___ ____ _________ ___ ____ ___ ____ ____ ____ _____.
_____ _______ ________ _____ _____ _________ ________.
__________ ___ ___ _______ _____ ______ __________ _________ ______ _________.
_____ ______ ______ ______ __________ __________ _______ __________ _____ ___ _____.
__________ ________ _________ ______ _____ _____ ___.
__________ _______ _____ ________ ____ ________ ___ ______ ____ _______ _______ ____.
__________ _________ _________ _________ ____ _____.
________ _________ _______ ____ _________ __________ ____ _____ _____ ______ ___ __________.
________ ________ ____ _____ ___ ___ _______ ________ ___ _________ ______.
__________ ___ ________ ____ ____.
________ ________ _____ ______ ___ __________ ____ _________ _______ ____.
__________ __________ _____ ___ ________ __________.
________ _________ ________ __________ __________ _______ ___ _____ ______.
__________ ______ ______ _______ ______ _____.
__________ ________ _________ __________ _________ ________ ______.
__________ ___ _______ _____ ____ _____ ____ ___ _______ _____ _______.
____ _________ _____ _________ ________ __________.
____ ________ ______ _________ ______ ____ ______ _______.
_______ _____ _____ _________ ______.

IGNOU ACADEMY

Your IGNOU journey, made easier.

Solved Assignments
Study Notes
Guess Papers
Question Papers

Call Us WhatsApp

STUDY • PREPARE • SUCCEED

Skip in 10