Acid-base titration help please? Thank you very much!
If a titration of a 10.0 mL sample of unknown concentration acetic acid with 0.100 mol/L sodium hydroxide is carried out. The volume of NaOH is added and the pH of the solution is recorded at 0.5 mL intervals in 3 trials. What evaluation can be made for this experiment?
1 Answer | Add Yours
If you do a graph of pH vs. mL of NaOH, you will see that the pH gradually rises with each addition of the NaOH until all of the acetic acid in the sample is neutralized. Then a small addition of NaOH should result in a much greater increase in the pH of the solution.
Once you have your graph and have identified the amount of NaOH needed to neutralize the acetic acid, you can then calculate the concentration of the acetic acid solution.
The relationship you will use is the following:
the mL of NaOH * concentration of the NaOH = mL of acetic acid * concentration of the acetic acid.
You get the mL of NaOH from the graph; you know the concentration of the NaOH; you know the mLof acetic acid so you can solve for the concentration of the acetic acid solution.
We’ve answered 319,838 questions. We can answer yours, too.Ask a question