1. Measurement in the Laboratory
Proper Techniques Explained

2. Precision Vs. Accuracy

3. Precision Vs. Accuracy

4. Tools Used in Lab Analytical balance Striker Mortar and pestle
Ring stand
Beaker
Erlenmeyer flask
Bunsen burner
Graduated cylinder
Clamp
Funnel
Stirring rod
Pipette
Tongs
Watch glass

5. Analytical balance

6. Striker

7. Mortar and Pestle

8. Ring Stand

9. Beaker

10. Erlenmeyer Flask

11. Stirring Rod

12. Funnel

13. Clamp

14. Bunsen Burner

15. Graduated Cylinder

16. Tongs

17. Watch Glass

18. Crucible

19. Buret

20. Pipette

21. Graduated Cylinder

22. Tools for Lab Measurement
Ruler
Graduated Cylinder
Thermometer
Two-Pan or Triple-Beam Balance

23. A Note About Precision
You must look at the effective range and increments of measurements on the instrument you are using.

24. Thermometers What are the increments?
How much can you safely estimate? 40 60 55 50 45 5 9 8 7 6
-30 10
-10
-20
0.4
0.3
0.2
0.1

25. Pan Balances What are the increments?
How much can you safely estimate? 40 50 60 70 80 90
100
110
120
130
140
150 1 2 3 4 5 6 7 8 9

26. Rulers What are the increments? How much can you safely estimate? A BD E F G H I J K L M N 1 2 3 4 5 6 7 8 9

27. Graduated Cylinders What are the increments?
How much can you safely estimate? 40 60 55 50 45 5 9 8 7 6
-30 10
-10
-20
0.4
0.3
0.2
0.1