11th Class Chemistry Equilibrium Question Bank 11th CBSE Chemistry Ionic Equilibrium

  • question_answer
    Why common salt is added to precipitate out soap from the solution during its manufacture?


                    Soap is sodium salt of higher fatty acids (RCOONa). On adding common salt, \[N{{a}^{+}}\] ion concentration increases. Hence, the equilibrium \[RCOONa(s)\rightleftharpoons \,RCO{{O}^{-}}+N{{a}^{+}}\] shifts in the backward direction, i.e., soap precipitates out.

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