Thames & Kosmos Global Water Quality handleiding
Handleiding
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EXPERIMENT 7 Measuring pH
As you learned in the previous experiments, water is essential to
the life of all animals and plants, and when it is polluted, it can
do us a lot of harm. You can take a measurement, called a pH
measurement, to determine if water is overly acidic or basic, and
therefore harmful to plants and people.
The pH value is an indication of how acidic or basic
(alkaline) a substance is. A base or alkali is the opposite of
an acid.
You will need:
indicator paper, pipette, 3 small measuring cups,
as well as: water, scissors, vinegar or lemon juice, paper towel
1
In one cup,
mix a few
drops of vinegar
and one pipette of
water.
Mix lemon juice and
water in the second
cup, and to the third
cup, just add water.
3
Briefly dip the slices of paper into the
liquid and set them down on the paper
towel. Compare the color against the pH
color scale. You will also find a table with
the color scale on the die-cut sheet.
2
Cut the indicator
paper in half, and
then lengthwise
down the center.
14
Global Water Quality Manual 2013.indd 14 2/7/13 10:22 AM
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Global Water Quality |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3490 MB |
