Compute the pH of a mixture of 0.25 M acetic acid CH3COOH and 0.1 M sodium acetate (CH3COO-NA+). The pKa of acetic acid is 4.76. Next, compute the pH of the same solution to which 3.5 ml of 6.05 M HCL has as well been added. Ignore the volume of the added HCL in your computation since its quantity is trivial. Utilize the Henderson-Hasselbalch equation to solve both of these problems.