In: Chemistry
A beaker with 155 mL 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 mol L−1. A student adds 6.60 mL of a 0.300 mol L−1 HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.