Thames & Kosmos Creative Cosmetics Lab handleiding
Handleiding
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EXPERIMENT 5
Oil and water
YOU WILL NEED
Large beaker, small beaker, stirring rod,
oil (any type), water
WHAT’S HAPPENING
An important property of water is that it is a polar
molecule. This means that one side of the molecule has
a slight positive charge while the other has a slight
negative charge. Water is polar because the oxygen
atom is a much larger atom than the two hydrogens.
This has an important influence on the way that
water interacts with other molecules.
Unlike water, oils are nonpolar. This
is because oils have long chains
of carbons and hydrogens, which
don’t have different positively and
negatively charged ends like water.
This difference in polarity between
water and oil is the reason that oil
and water don’t mix! A general rule
of thumb is that polar liquids dissolve
in polar liquids, and nonpolar liquids
dissolve in nonpolar liquids.
HERE’S HOW
1
Into the large beaker, pour 20 ml of water.
Then pour 20 ml of oil. What do you notice
about how the oil and water interact?
2
Stir the contents until the oil and water
appear mixed. Let the liquid sit for 30
minutes. Observe what happens to the oil
and water.
Keep the oil and water
for the next experiment.
O
H
H
5
10
15
20
25
30
50
75
100
125
50
75
100
125
H
2
C
HC
H
2
C
O
O
O
9 12 15
O
O
O
14
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Creative Cosmetics Lab |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10798 MB |
