A beaker with 130 mL of an acetic acid buffer with a pH of 5.00is sitting on a benchtop. The total molarity of acid and conjugatebase in this buffer is 0.100 M. A student adds 6.20 mL of a 0.490 MHCl solution to the beaker. How much will the pH change? The pKa ofacetic acid is 4.760.
Express answer numerically to two decimal places. Use a minus(-) sign if the pH has decreased.