Hypochlorous acid (HOCl)has an ionization constant of 3.2 × 10^-8.What is its percent ionization in 1.0 M and 0.10 M solutions,respectively? A)0.018% and 0.057% B)0.032% and 0.0032% C)0.57% and 0.18% D)0.57% in both E)0.32% in both

Question

Quizplus · Accepted Answer

The percent ionization of a weak acid in solution can be calculated using the formula: % ionization = ([H+] / [HA]initial) * 100%, where [H+] is the concentration of hydrogen ions produced, and [HA]initial is the initial concentration of the acid. For hypochlorous acid (HOCl) with an ionization constant (Ka) of 3.2 × 10^-8, the percent ionization will decrease as the concentration of the acid increases due to the dilution effect. At 1.0 M, the ionization is lower than at 0.10 M, which is consistent with the given options. Calculating the exact percent ionization requires using the Ka value and the initial concentrations in the ionization expression, but the correct answer based on the provided options and understanding of acid ionization principles is A) 0.018% and 0.057%. This reflects the expected trend that the percent ionization increases as the concentration of the acid decreases.

Hypochlorous Acid (HOCl)has an Ionization Constant of 3