Experiment 11 - Laboratory Examination - Acid-Base Titration
Part B - Acid-Base Titration
- Obtain about 100 mL of the NaOH solution in a clean and dry beaker.
- Fill the buret with the base solution.
- Transfer about 75 mL of the potassium hydrogen phthalate, HKC8H4O4,
solution into a clean and dry beaker.
- Pipet 25.00 mL of the acid solution into an erlenmeyer flask. Add about
3 drops of phenolphthalein indicator solution to the acid in the flask.
- Add the NaOH solution in the buret to the potassium hydrogen phthalate,
HKC8H4O4, solution in the flask until a pink
end point is reached.
- Read the buret carefully to determine the quantity of base used to reach
the end point. Record the volume of the NaOH solution used.
- Repeat steps 4 to 6 until two results are obtained which agree within +/-
- Enter your data clearly on the datasheet and present calculations to show
how you determined the concentration of the NaOH solution in moles/L.