Pre-Lab Part I: Define the following terms: Measurement Matter Length Volume Mass Temperature

1. Pre-Lab Part I: Define the following terms: • Measurement • Matter • Length • Volume • Mass • Temperature • Density • Glassware

2. Pre-Lab Part II: Complete the following chart:

3. Pre-Lab Part III: Answer the following: • What advantage does the International System of Units (SI) have over the English system? • Explain the difference between mass and weight. • Why is some laboratory equipment made of porcelain instead of glass? • Draw three examples of safety symbols and explain their meaning.

4. Laboratory Equipment Lab Guide No. 1

5. Objectives • Identify standard laboratory equipment • Explain standard use of laboratory equipment

6. GLASSWARE

7. Beaker • measures volume • used as a container (like a cup) • may be heated • common sizes: 100, 250, 400 mL

8. Erlenmeyer Flask • measures volume • used to heat and store liquids • common sizes: 125, 250, 500 mL • The bottom is wider than the top so it will heat quicker because of the greater surface area exposed to the heat.

9. Graduated Cylinder • used to make accurate measurements of liquid volumes • meniscus

10. Test Tubes • used to hold, mix, or heat small quantities of solid or liquid chemicals

11. Pipet (Pipette) • used for moving small amounts of liquid from place to place

12. Buret (Burette) • used to dispense determined amounts of liquids in experiments • marked with a milliliter scale • pinch clamp at the bottom

13. Funnel • used to target liquids into any container so they will not be lost or spilled • can be used with filter paper

14. Watch Glass • used to hold solids when being weighed or transported • should never be heated

15. Volumetric Flask • used to measure one specific volume (very accurate) • mostly used in mixing solutions where a one liter or one half a liter is needed

16. Florence Flask • used as a container to hold liquids • has a round bottom with a single long neck • designed for uniform heating and ease of swirling

17. Stirring Rod (To stir means to mix around) • used to stir things • usually made of glass.

18. GLASSWARE

19. GLASSWARE

20. GLASSWARE

21. GLASSWARE

22. GLASSWARE

23. GLASSWARE

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25. GLASSWARE

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27. GLASSWARE

28. GLASSWARE

29. PORCELAIN

30. Evaporating Dish • porcelain • used to heat and evaporate liquids

31. Crucible • Crucibles are used to heat small quantities to very high temperatures.

32. Mortar and Pestle • used to crush (grind) solids into powders for experiments, usually to better dissolve the solids.

33. Test Tube Holder • used to hold test tubes when they are hot and untouchable

34. Tongs • used to hold many different things such as flasks, crucibles, and evaporating dishes when they are hot

35. Clamps • attached to the ring stand • used to hold a large test tube or flask

36. Spatula • useful for transferring small amounts of solids

37. Iron Ring • Used to fasten to the ring stand as a support for different equipment.

38. Ring Stand • used to hold items being heated

39. REVIEW

49. OTHEREQUIPMENT

50. Stoppers • come in many different sizes • the sizes are from 0 to 8. • can have holes for thermometers and for other probes that may be used