A beaker with 105 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 MM. A student adds 9.00 mL of a 0.460M HCl solution to the beaker. How much will the pH change? The pKaof acetic acid is 4.740.
Express your answer numerically to two decimal places. Use aminus ( − ) sign if the pH has decreased.
