A solution was prepared by dissolving 0.0211 mole of propionic acid and 0.0159 mole of sodium propionate in 1.00 L? What would be the pH of the solution in the beaker after 1.94 mL of 0.0121 M HCl were added?
a) 2.46
b) 3.25
c) 4.62
d) 5.78