Question

The addition of HCl (becomes H+ and Cl- upon dissociation) would shift the equilibrium to the

Fe(OH)₃ + 3H⁺(aq)⇆Fe³⁺(aq)+3H₂O

Answer 1

The addition of HCl would increase concentration of H⁺ and would thus shift the equilibrium to the right. This will result from increased frequency of successful collisions of the reactants due to increased concentration of H⁺ in the reaction system.