A beaker with 2.00×10^2 mL of an acetic acid buffer with a pH of5.000 is sitting on a benchtop. The total molarity of acid andconjugate base in this buffer is 0.100 M. A student adds 6.60 mL ofa 0.400 M HCl solution to the beaker. How much will the pH change?The pKa of acetic acid is 4.740
