Question

A) Which way will equilibrium shift if add sodium acetate to 0.1 M acetic acid? Why does it shift this way?
B) Which way will equilibrium shift if add NaOH to acetic acid? Why does it shift this way?

Answer 1

(A) CH3COOh is a weak acid so it will dissociates partially

CH3COOH <----> CH3COO- + H+

Upon addition of CH3COONa the the concentration of acetate ions increasing there by common ion effect place effective role which supresses the dissociation of acetic acid.

So according to Lechartler's effect the equilibrium shifts towards back ward that is towars the reactants side.

(B) Upon addition of NaOH being strong base it will dissociates completly & it will help in the dissociation of CH3COOH further so the equilibrium shifts towards right side that means forward reaction takes place