COMEDK Exam 2019 Solved Paper

NaCl on dissociation gives Na+and Cl−ions as follows:

NaCl(aq)

Sodium‌chloride

→

Na+

Common‌ions

+Cl−(ions)
While, soap in the solution gives RCOO−and Na+ions as follows:
R−

CO‌ − O ‌ + Na (s)

Soap

→RCOO−+Na+
∴ Solubility of soap decrease due to common ion (Na+) present in the solution due to Le-Chatelier's principle, reaction shifts towards the reactant side.