Strips of indicator paper soaked in potassium nitrate solution are spanned between two copper electrodes inside a ribbed trough. A drop of hydrochloric acid or sodium hydroxide is dripped onto the middle of these strips. When a voltage is applied, it can be seen how the ions migrate along the paper.
| Materiallist (Excerpt) |
Product |
Amount |
|
Hydrochloric acid 37 %, 1000 ml
|
30214-70
|
1
|
|
Sodium hydroxide, flakes, 500 g
|
30157-50
|
1
|
|
Potassium nitrate 250 g
|
30106-25
|
1
|
|
Trough, grooved, w/o lid
|
34568-01
|
1
|
|
Protecting glasses, clear glass
|
39316-00
|
1
|
|
Indicator paper, pH1-11, book
|
47006-01
|
1
|
|
Circular filter,d 150 mm,100 pcs
|
32977-06
|
1
|
|
Alligator clips, bare, 10 pcs
|
07274-03
|
1
|
|
Glass beaker DURAN®, short, 150 ml
|
36012-00
|
1
|
|
Connecting cord,15A,50cm, red
|
07314-01
|
1
|
|
Connecting cord,15A,50cm, blue
|
07314-04
|
1
|
|
Copper electrode 76x40 mm
|
45212-00
|
2
|
|
Pipette with rubber bulb
|
64701-00
|
2
|
|
Tweezers,straight,blunt, 130 mm
|
64610-00
|
1
|
|
Flat battery, 4.5 V
|
07496-01
|
1
|
|
Glass rod,boro 3.3,l=200mm, d=5mm
|
40485-03
|
1
|
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