d the answer should fall between 9.08 and 9.13 apparently)
Hey there! Here is the solution!
Notice that we have a buffer solution, and we are adding a strong base to it, so in the ICF chart we only care about those three species. Also, because we had only 1L solution, in order to find moles of the WB and WA you simply divide the Molarity by L. Once you react NaOH with the buffer, you use the Henderson Hasselbalch equation to find pH.
Let us know if you have more questions on this!