U2 In the Laboratory Std PDF

Preview

Summary

Een doc die tijdens een les klassikaal wordt opgelost. Examenleerstof...

Description

II. IN THE LABORATORY 1. Laboratory Equipment 1.1 Definitions 1.1.1 Do you remember the names of your lab tools? Old-school cut & paste matching-up exercise   

Download the file you can find on Canvas. Cut along the lines. Make pairs of three (name, item & definition) & paste them next to each other.

Finished? Then answer the questions. a) Name 3 pieces of glassware used for heating liquids.

b) Which pieces of equipment are used to obtain precise measurements of liquids? c) Which pieces of equipment are used for heating other substances? d) Which pieces of equipment are used for obtaining solids for measuring mass? )

e) Identify the difference(s) between tongs and test tube clamps. tongs have a flat end to grab anything, test tube clamps have a curved end to hold up the test tube

6 English

2BL

1.1.2 Fill the following schemes with suitable expressions. Filtration f

1 6

quest.org/11430/research/filtration.htm

tp://student.britannica.com/eb/art/print? id=66040&articleTypeId=0

7 English

2BL

1.2 What do you use it for? 1.2.1 Fill in the blanks with the following verbs. heat

hold

measure

stir

support

transfer

protect

We use a beaker to _______ _____________ a liquid.

We use a spatula to _________ ___________ a small amount of solid.

We use a measuring cylinder to _____ _______________ the volume of a liquid.

We use a glass rod to ___________ a liquid in a beaker.

We use a dropper to __________ __________ a small amount of liquid.

We use a test-tube rack to ________ ____________ test tubes in place.

8 English

2BL

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.

We use an electronic balance to ________ ____________ mass.

We use a test tube to ________ ____________ a liquid.

1.2.2 What tools do we need in order to carry out the following steps in an experiment? Write them on the right place in the crossword puzzle. A = across & D = down. Easy: unscramble the letters. 8A. Measuring exactly 43mL of an acid (rtube) 7A. Massing out 120 g of sodium chloride (acbnela) . 13D. Suspending glassware over the Bunsen burner (rwei zeagu) 2D. Used to pour liquids into containers with small openings or to hold filter paper (unfenl) 11A. Mixing a small amount of chemicals together (lewl letpa) 16A. Used to clean the inside of test tubes or graduated cylinders (iwer srbuh) 18D. Heating contents in the lab (nuesnb bneurr) 10D. Transport a hot beaker (gntos) T Harder: find the item you need to do this 9 English

2BL

15D. Measuring exactly 43 ml of water 9D. Pouring 50 mL of liquid from one container to another 12A. Dropping small quantities of liquids into test 6A. Holding a test tube over a Bunsen burner for heating 19A. Protects your eyes from spattering solids and splashing 1D. Determine if water is 5D. Covering a beaker of boiling water to prevent splattering 4D.Rinsing out glassware with distilled water 20A.Heating a dissolved substance in water to drive off water 14A.Holding hot objects in flame 3D.Heating substances to a constant temperature

10 English

2BL

1.2.

11 English

2BL...