Laboratory starter: What is a laboratory? Vocabulary & Writing: Laboratory Equipment Grammar

LABORATORY


Starter: What is a laboratory?
Vocabulary & Writing: Laboratory Equipment
Grammar: Countable and Uncountable Nouns

		What is a laboratory?

1) How often do you work in the laboratory?

2) What procedures do you usually perform in the laboratory?
3) Can you name any laboratory glassware in English?

		Laboratory equipment

1. Name the apparatus Write the English names under each picture.

beaker	Bunsen burner	dropper	glass rod
heat-proof mat	measuring cylinder	spatula	test tu be
test-tube rack	electronic balance	tripod	wire gauze
boiling tube	clamp	flask	metre rule
reagent bottle	safety gogg les	stop-watch	stand
test-tube holder	thermometer	watch glass

_______________	_______________	3. ________________	4. ______________
5. ________________	6. ________________	7. ________________	8. ______________
9. ________________	10. ________________	11. _______________	12. _____________
13. _______________	14. _______________	15. _______________	16. _____________
17. _______________	18. ________________	19. _______________	20. _____________
21. _______________	22. _______________	23. _______________

2. What do we use the equipment for? Fill in the blanks with the following verbs.

heat	hold	measure	protect
stir	support	transfer

1.		We use a beaker to ______________ a liquid.
2.		We use a test tube to _____________ a liquid.
3.		We use a test-tube rack to ______________ test tubes in place.
4.		We use a glass rod to ____________ a liquid in a beaker.
5.		We use a dropper to ________________ a small amount of liquid.
6.		We use a spatula to _______________ a small amount of solid.
7.		We use a Bunsen burner to _______________ water in a beaker. We use a tripod and a wire gauze to _______________ the beaker during heating. We use a heat-proof mat to ______________ the bench during heating.
8.		We use an electronic balance to ______________ weight.
9.		We use a measuring cylinder to ______________ the volume of a liquid.

3. Complete the text with the given words. There are some extra words.

solution paper towel detergent glassware gloves milk tap water rinse impurities evaporate condense fumes solvent brush solute stoppers soak



Cleaning laboratory glassware


Cleaning laboratory glassware isn’t as simple as washing the dishes. Here are some tips on how to wash your glassware so that you won’t ruin your chemical solution or laboratory experiment. Usually, the ____________ which is designed for lab glassware is used. You can ____________ the glassware with the proper ____________, then finish up with a couple of rinses with distilled water, followed by final rinses with deionised water. Remove ____________ and stopcocks when they are not in use. Otherwise they may ‘freeze’ in place. Wear ___________ and avoid breathing the ____________. If the glassware requires scrubbing, scrub with a ___________ using hot soapy water, rinse thoroughly with ____________, followed by rinses with deionised water. In some cases, you may need to __________ the glassware overnight in soapy water. It is inadvisable to dry glassware with a ___________ or forced air since this can introduce fibres or __________ that can contaminate the solution. Normally you can allow glassware to air dry on the shelf. Otherwise, if you are adding water to the glassware, it is fine to leave it wet (unless it will affect the concentration of the final __________). If the solvent will be ether, you can rinse the glassware with ethanol or acetone to remove the water, and then rinse with the final solution to remove the alcohol or acetone. If ____________ is to be used immediately after washing and must be dry, rinse it 2-3 times with acetone. This will remove any water and will ____________ quickly. While it’s not a great idea to blow air into glassware to dry it, sometimes you can apply a vacuum to evaporate the solvent.