A beaker with 155 mL of an acetic acid buffer with a pH of 5.000is sitting on a benchtop. The total molarity of acid and conjugatebase in this buffer is 0.100 M. A student adds 5.20 mL of a 0.460 MHCl solution to the beaker. How much will the pH change? The pKa ofacetic acid is 4.740. Express answer numerically to two decimalplaces. Use a minus sign if the pH has decreased.
