Procedure
Set up:
1) Grind a pill in a mortar into a fine powder.
2) Weigh out 1.0g and wash the powder into a 250 mL Erlenmeyer flask with about 50 mL of water.
3) Put 100.00 mL of 0.1M HCl in the Erlenmeyer flask and put the flask on a hot plate and boil for 5 minutes. Once boiled allow to cool until at room temperature.
4) Transfer the solution into a 240 mL titration jar and start a new experiment on the data collection system.
5) Connect a pH sensor and the Rotary Motion sensor to the data collection system.
6) In DataStudio create a data set for volume and another for the first derivative of pH vs. volume.
7) Display the pH sensor on the y axis of a graph and volume on the x axis.
8) Set up the titrator pump and rinse the syringe on the pump.
9) Set up the titrator accesory and calibrate the pH sensor.
10) Add the micro stir bar to the end of the pH sensor.
11) Setup the titratant container and replace the cap on the bottle, but not airtight.
12) Load the syringe on the pump with the titrant solution and prime the pump on the Titrator.
13) Mount the jar with the sample on the titration accessory and turn on the magnetic stirrer at a steady rate.
Collect Data:
- Start recording data and press the run button on the Titrator to start the titration.
- Continue the titration past the equivalence point until the pH curve flattens.
- Stop recording the data and print the graph.
- Save the experiment and clean up according to teacher’s instructions and clean the syringe.