This question refers to a previous question in my book: Calculate the pH of .1 M NaC3H5O2. The question I'm stuck with now: Calculate the pH after .02 mol NaOH is added to 1 L of the *previous* solution.
The Henderson-Hasselbalch equation or the simple equilibrium equation has to be used here.
The Attempt at a Solution
I don't know where to start actually...plz help :)