Experiment 8 - Equivalent Weight of an Unknown Acid
Part B - Acid-Base Titration
- Obtain about 100 mL of standardized base solution in a clean
and dry beaker. (The oven may be used to dry the beaker.)
- Acclimatize and fill the buret with the base solution.
- Transfer about 50 mL of the acid solution into a clean
and dry 100 mL beaker. (The oven may be used to dry the beaker.)
- Pipet 25.00 mL of the acid solution into an Erlenmeyer flask. Add about
3 drops of phenolphthalein indicator solution to the acid solution in the
- Add the sodium hydroxide solution in the buret to the acid solution in the
flask until the 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 base solution used.
- Repeat the above procedure until two results are obtained which agree within
+/- 0.10 mL.