Thames & Kosmos Chemistry C500 (Version 2.0) handleiding

Niet gecategoriseerd

Thames & Kosmos

52 pagina's

PDF beschikbaar

Handleiding

The invisible fire

extinguisher

YOU WILL NEED

→ test tube

→ measuring spoon

→ sodium carbonate

→ tealight candle

→ fireproof surface (small

plate)

→ cup of white vinegar

HERE’S HOW

1. Place the tealight candle on a ﬁreproof

surface, such as a small ceramic plate.

Light the candle.

2. Fill the test tube with 2 cm of white

vinegar. Add 1 large spoonful of sodium

carbonate to the test tube. Keep the

test tube steady and upright as the

foam forms.

3. As soon as the reaction has calmed

down and the column of foam shrinks,

carefully tilt the test tube next to the

candle ﬂame, as if you are pouring the

air out of it. Do not allow any of the

liquid in the test tube to spill out. The

illustration shows you how to do it best.

Does the ﬂame go out, as if by magic?

The ﬂame is extinguished by the

carbon dioxide gas, because it

spreads out like a carpet over the

tealight, smothering the ﬂame.

SODIUM

CARBONATE

2 CM

VINEGAR

Safety Note: For sodium carbonate, note the

“Information about hazardous substances” on page 7!

→

WHAT’S HAPPENING?

Effervescent Powder | 13

EXPERIMENT 4

Bekijk gratis de handleiding van Thames & Kosmos Chemistry C500 (Version 2.0), stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.