1. Laboratory Glassware and equipment

2. Outline Welcome Reading a Meniscus Types of Glassware
Reading and Recording Volumes
Cleaning Glassware
Digital Thermometer
Using Graduated Glassware
Using a Buret
Using a Pipet
Using a Volumetric Flask
Cleanup
Next Assignment

3. Welcome Welcome to the chemistry lab!
Chemistry is a lot of fun, but can be even more so if you are familiar with the equipment you will be using in lab.
Remember – whenever there’s glassware or chemicals out in lab, everyone has to wear goggles!

4. Reading a Meniscus
Meniscus and Parallax

5. Types of Glassware Graduated glassware
Volumetric (non-graduated) glassware

6. Graduated Glassware Beakers Filtering Flasks Graduated Cylinders
Use: To contain certain volumes of solutions
Filtering Flasks
Graduated Cylinders
Use: To measure out exact volumes.
Burets
Use: To dispense exact volumes.

7. Volumetric (non-graduated) Glassware
Volumetric Pipets
Use: To measure out exact volumes. This is the most accurate glassware in lab.
Volumetric Flasks
Use: To make up specified volumes and concentrations of solutions.

8. Reading and Recording Volumes
We use significant figures to indicate the accuracy and precision of glassware.
Significant figures for graduated glassware are determined differently from those of volumetric glassware.

9. Significant Figures: Volumetric Glassware
Glassware tolerance is printed on the glassware.
For example:
The 50 mL volumetric flask has a tolerance of ± 0.05 mL. Whenever you use your 50 mL volumetric flask, you will always report two zeros after the decimal, i.e mL.

10. Volumetric Flask
When this volumetric flask is filled to the calibration mark, what volume should be reported?

11. Volumetric Pipet
When this pipet is used to dispense solution, what volume should be reported?

12. Volumetric Pipet
When this pipet is used to dispense solution, what volume should be reported? And to which line should the pipet be filled?

13. Significant Figures: Graduated Glassware
Look at the glassware in question.
Find the smallest graduation.
Report your volume to the closest 10% of the smallest graduation.

14. Reading Graduated Glassware

15. Reading Graduated Glassware

16. Reading Graduated Glassware

17. Reading Graduated Glassware

18. Reading Graduated Glassware

19. Reading Graduated Glassware

20. Smallest Graduation A. Calculate major graduation – major graduation
B. Determine the number of spaces between two major graduations
Smallest Graduation = A / B

21. Reading Beakers
What volume should be reported?

22. Reading Beakers Smallest graduation: 10 mL 10% value: 1 mL
Volume to the closest 10% of the SG:
48 mL

23. Reading Graduated Cylinders
What volume should be reported?

24. Reading Graduated Cylinders
Smallest graduation: 1 mL
10% value: 0.1 mL
Volume to the closest 10% of the SG:
52.8 mL

25. Reading Burets
What volume should be reported?

26. Reading Burets Smallest graduation: 0.1 mL 10% value: 0.01 mL
Volume to the closest 10% of the SG:
40.05 mL

27. Cleaning Glassware
Each student has glassware at their individual stations. Each student is responsible for the care of their glassware.
Wash glassware with soap and a brush
Rinse glassware with tap water
Do a final rinse with very little distilled water from the distilled water faucet or from your water bottle
Dry your glassware
Return glassware to the APPROPRIATE drawer

28. Cleaning Carefully clean and dry all of the equipment you used today.
Glassware gets slippery when wet, so hold on!
Place your equipment / glassware in the appropriate locations in the glassware drawer.
If you are unsure of their proper location, ask your instructor.