You Decide to Put Your Growing Knowledge of Chemistry to Profit

You decide to put your growing knowledge of chemistry to profit by making and selling boutique soaps that are ultra mild and have an almost neutral pH. What is the pH of your best liquid soap made from a fatty acid that has a pK_a value of 2.0? The concentration of the active ingredient, a fatty acid salt, is 1.0 M.

A) 2.0
B) 7.5
C) 8.0
D) 8.5
E) 9.0