A beaker with 195 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 5.30 mL ofa 0.480 M HCl solution to the beaker. How much will the pHchange? The pKa of acetic acid is 4.740.
Express your answer numerically to two decimal places. Use aminus ( − ) sign if the pH has decreased.
