A buffer is made by dissolving 0.0500 mol potassium acetate and 0.0500 mol acetic acid in some water and adding water until the volume is a little less than a liter. The pH is adjusted to 5.00 by adding small amounts of concentrated acid (HCl) and base (NaOH) as needed, and the solution is then diluted to exactly 1.00 L. What are the equilibrium molar concentrations of acetic acid and acetate ion in the solution?