Alisha Marks

Chemistry

20 December, 18:39

As you saw in the video, the pH of a 0.1 M solution of acetic acid, HC2H3 02, (Ka 1.8 x 10^-5) is 2.9. Based on this observation, which statement below best describes the pH of a 0.1 M solution of lactic acid, HC3H O3, (Ka E 1.4 X 10^-4) ?

A) Since lactic acid has a larger acid dissociation constant than acetic acid, a 0.1 M solution of lactic acid will have a larger pH value than a 0.1 Macetic acid solution.

B) The pH of a 0.1 M acetic acid solution will be equal to the pH of a 0.1 M lactic acid solution since both are weak acids.

C) Since lactic acid has a larger acid dissociation constant than acetic acid, a 0.1 M solution of lactic acid will have a smaller pH value than a 0.1 M acetic acid solution.

D) Since lactic acid has a smaller acid dissociation constant than acetic acid, a 0.1 M solution of lactic acid will have a larger pH value than a 0.1 M acetic acid solution.