Calculate (a) the pH of a 0.0250 M solution of phenylacetic acid, and (b) the pH of a 0.0500 M solution of sodium phenylacetate. The pKa of phenylacetic acid is 4.31, and its structure is shown below.

Calculate a the pH of a 00250 M solution of phenylacetic acid and b the pH of a 00500 M solution of sodium phenylacetate The pKa of phenylacetic acid is 431 and class=