Homework Help: Finding pH of solution

1. Nov 18, 2012

Rron

1. The problem statement, all variables and given/known data
A solution is prepared by mixing 200 mL of 0.2 M CH3COOH with 100 mL of 0.1 M of NaOH solution.Calculate the pH of the solution.(Ka=1.8x10^-5)

I really don't know how to start this, so please help me.Its gonna be a similar one on my exam tomorrow.

Thanks.

2. Nov 18, 2012

symbolipoint

Some of what you are missing is to fill in THIS information more precisely:

2. Relevant equations and rules

CH3OOH + NaOH ⇔ NaCH3OO + H2O

Ka = $\frac{[H][CH3OO]}{[CH3OOH]}$

3. Nov 18, 2012

Staff: Mentor

Buffer and Henderson-Hasselbalch equation.