DRAFT: This module has unpublished changes.

Set Up:


1. Weigh out 4.2 g of NaOH. Dissolve it quickly in about 50 mL of water in a 250-mL Erlenmeyer flask


2. Carefully transfer the solution into a 1- volumetric flask and fill the flask to the 1000 mL mark with deionized water


3. Seal the flask with its stopper, invert the flask, and shake gently. Then vent the flask.


4. Transfer the solution into a 1-L plastic bottle and close it. Label the bottle properly.


5. Start a new experiment on the data collection system


6. Connect a pH sensor and the Rotary Motion sensor to the data collection system


7. In Data Studion create a calculated dataset for volume: V = 670 * x


8. In Data Studio create a calculated dataset for the first derivative of the pH vs. Colume. Use the pH measurement for x. the equation is: dpH = derivative(2,x)

 

9. Display the pH on the y-axis of a graph and Volume on the x-axis

 

10. Setup the Titrator pump

 

11. Rinse the syringe on the Titrator pump

 

12. Setup the Titrator Accessory

 

13. Calibrate the pH sensor

 

14. Add the micro stir bar to the end of the pH sensor

 

15. Setup the titrant container and replace the cap on the bottle, but not airtight

 

16. Load the syringe on the pump with the titrant solution

 

17. Prime the pump on the Titrator

 

18. Measure about 0.200 g of KHP to the nearest milligram and record this value in Table 1. Then wash the KHP sample from the weighing dish with about 50 mL of water, into a 180-mL titration jar

 

19. Add enough deionized water to the solution so the tip of the pH sensor is covered with solution

 

20. Turn on the magnetic stirrer at a steady rate

 

21. Display the pH on the y-axis of a graph and Drop Count on the x-axis

DRAFT: This module has unpublished changes.