Question

When a weak acid solution is diluted by half, the fraction of ionized weak acid increases. Using the reaction quotient, demonstrate this effect and explain why the increase in ionization occurs.

Answer 1

Example of a wook acid is eHeooh (acetic acid) In aqueous solution the ionization of acetic acid is. as o follows CH₂COOH (aq) + Hole) – Hot (aq) + et eoo (aq) Now if the reaction medium is dituted on water is added then the equilibrium will be hampered and for an instance Ho will increase so if reaction quotient (8) at that intance will decrease is given as a. [H3O+] cenzeool [esta cook] [H₂o] and if ok be the equilibriuma rate constant t. [tz of eq [enzedo Jeq . [enzooh eq [H₂o] aq .. Now according to to Le châtelier's principle as [It₂0] > [Hoje it will result as a <k at the instance of dilution which will result more CH₂ CoolH to be ionized (means mes more engroot will react with exeens coater CH20 ) to give more Hot or acidity will increase to achieve the equilibrium once again.