Thames & Kosmos Chemistry C500 (Version 2.0) handleiding

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Thames & Kosmos

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Handleiding

Test tubes

To carry out your chemical reactions, you will be using

test tubes — just like a real chemist. Use the test tube

rack to hold the test tubes upright, as shown to the

left. Use the rubber stopper to close a test tube whose

contents you have to shake. When you shake it, keep

your thumb pressed against the stopper. Don't forget

to clean the stopper before using it to shake a

different chemical.

Measuring spoon

Use the double-headed measuring

spoon, which has a large end and a

small end, to take chemicals

from the vials. A “large”

spoonful means one level

scoop from the larger end,

while a “small” spoonful

means a level scoop from the

small end. Sometimes a “spoon

tip” will be enough, meaning no

more than half of the small end, or

preferably even less. Always make sure

you close the vial immediately after each use!

Dropper pipettes

You will be using the dropper pipettes when adding

liquids drop by drop. Squeeze the upper section of

the pipette between your thumb and foreﬁnger,

and dip the pipette tip into the liquid. As soon

as you release the pressure, the liquid will

rise up the pipette. You can then add the

liquid drop by drop by applying light

pressure. Rinse the pipette thoroughly after

each use (ﬁll several times with water, shake,

and squeeze out).

How the dropper pipettes work

1 cm

2 cm

3 cm

Test tube at 1:1 scale, for measuring

4 cm

5 cm

6 cm

7 cm

1 small

spoonful

1 large

spoonful

EQUIPMENT

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