In: Chemistry
A beaker with 135 mLmL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 MM. A student adds 4.70 mLmL of a 0.440 MM HClHCl solution to the beaker. How much will the pH change? The pKapKa of acetic acid is 4.740.
Express your answer numerically to two decimal places. Use a minus ( −− ) sign if the pH has decreased.