Suppose we were given a sample of acetic acid, CH3COOH (Ka = 1.8 x 10-5) of unknown concentration.
You titrate 25.00 mL of this solution with a 0.70 mol/L NaOH solution.
If your initial buret reading was 0.45 mL and your buret reading at your endpoint was 35.30 mL, what was the initial concentration of acetic acid in your 25.00 mL sample?
Express your answer in mol/L but do not include units in your answer. Include at least 4 decimal places in your answer.
Hide hint for Question 9
How many moles NaOH did you add? What do we assume about the moles of NaOH at our endpoint, compared to the moles of acetic acid at the start of the titration?
