Calculating pH After Adding NaOH to NaC3H5O2 Solution

[Doodan]

Homework Statement

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.

Homework Equations

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...please help :)

 

[chemisttree]

Write out the Henderson Hasselbach equation and tell us which terms you don't understand. Write out the equation for the combination of the two reagents and tell us what you don't understand.