DRAFT: This module has unpublished changes.

Setup 

1. Start a new experiment on the data collection system.

2. Connect the conductivity sensor to the data collection system.

3. Position the magnetic stirrer on the base of the ring stand.

4. Place a waste container on the magnetic stirrer.

5. Use the buret clamp to attach the bret to the ring stand.

6. Position the drop counter over the waste container and attach it to the ring stand using the right angle clamp.

7. Place the conductivity sensor through one of the slots in the drop counter.

8. Rinse the buret with several milliliters of the standardized 0.02000 H2SO4 solution.

9. Ensure that the stopcock is closed and rinse the inside of the buret with several milliliters of the standardized H2SO4 solution.

10. Open the stopcock on the buret and drain and rinse the solution into the container.

11. Repeat this process two more times.

12. Make sure the stopcock on the buret is in the off position and then use a funnel to fill the buret with about 50 mL of the titrant.

13. Drain a small amount of the titrant through the drop counter into the waste beaker to remove any air in the tip of the buret. 

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

15. Add additional H2SO4 to the buret so the solution is above the zero mark. Allow some of the solution to drop into the waste container until the bottom of the meniscus is lined up with or just below the zero mark and record the initial reading in table 1.

16. Remove the waste container.

17. Use the volumetric pipet to transfer 50.00 ml of the Ba(OH)2 solution into a 100 mL beaker.

18. Add enough deionized water to the beaker so the tip of the conductivity sensor is covered with solution. 

19. Turn on the magnetic stirrer at a slow and steady rate.

20. Connect the drop counter to the data collection system.

21. Display the conductivity on the y-axis of a graph and drop count on the x-axis.

 

Collect Data

22.Clean the lens of the drop counter inside the opening the drops go through with water and a cotton swab.

23. Start recording data.

24. Turn on the buret stopcock carefully, allowing the titrant to drip slowly into the solution.

25. Continue data collection until the curve passes its minimum point by about 3 mL.

26. Stop recording data.

27. Record the final drop count and the final reading of the titrant in the buret.

28. Calculate the volume of titrant and record this value.

29. Find the volume of H2SO4 solution used to reach the equivalence point.

30. Refill the buret above the zero mark with the H2SO4 solution and allow some of the solution to drop into a waste container until the top of the meniscus is lined up with the zero mark or just below.

31. Record the starting point in table 1.

32. Rinse the conductivity sensor tip with deionized water.

33. Remove the beaker and dispose of its contents according to the teacher's instructions.

34. Rinse the beaker with distilled water.

35. Use the volumetric pipet to transfer 50.00 mL of the Ba(OH)2 solution with the unknown concentration into a 100 mL beaker.

36. Add enough deionized water to the beaker so the tip of the conductivity sensor is covered with the solution. 

37. Tap the sensor a few times to make sure any trapper air is expelled from the sensor.

38. Turn on the magnetic stirrer at a slow and steady rate.

39. Display conductivity on the y-axis of the graph and drop count on the x-axis.

40. Repeat the same steps as previously to collect data.

41. Save your experiment and clean up.

DRAFT: This module has unpublished changes.