Thames & Kosmos Chemistry C500 (Version 2.0) handleiding
Handleiding
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WHAT’S HAPPENING?
Acid against
foam
YOU WILL NEED
→ 2 test tubes
→ measuring spoon
→ stopper
→ soap solution
→ tartaric acid
→ cup of water
HERE’S HOW
1. First dissolve a small spoonful of
tartaric acid in 3 cm of water in a test
tube. You will also need this solution for
the next experiment.
2. Fill some soap solution (from
Experiment 13) into a test tube, insert
the stopper, and shake until you get
some foam.
3. Drip a little of the tartaric acid solution
from step 1 into the soap solution.
What does the foam do?
The foam collapses and the solution
turns cloudy. After a little while, a
crumbly substance collects on the
liquid’s surface. That isn’t lime soap, but
insoluble fatty acids that are separated
out by the acid.
1
2
3
3 CM
WASSER
1
x
TARTARIC ACID
TARTARIC
ACID SOLUTION
Safety Note:
For tartaric acid, note the “Information
about hazardous substances” on page 7!
32
EXPERIMENT 17
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Chemistry C500 (Version 2.0) |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 25520 MB |
