The corrosion of iron

LC3.1.4.1

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Description

In this experiment the students explore the corrosion of iron. To accelerate this process, the students connect an iron electrode to a copper electrode in an electrically conductive manner. The reaction products of the corrosion, hydroxide ions and iron ions, are made visible by 2 indicators (phenolphthalein, potassium ferricyanide). Through this the students discover that iron goes into solution during iron corrosion and that corrosion is accelerated by contact with more noble metals.

Components of equipment sets

1	6753410 4	Water, pure, 5 l
1	6726100 4	Potassium ferrocyanide (III), 50 g EUH032
1	665212 4	Glass stirring rod 200 x 8 mm Ø
1	665754 4	Measuring cylinder 100 ml, with plastic base
1	6659531 4	Dropping pipette 150 mm x 7 mm Ø
1	6659541 8	Dropper bulb
1	602022 4	Beaker Boro 3.3, 100 ml, squat
1	500422 4	Connecting lead 19 A, 50 cm, blue
2	50186 4	Crocodile clip, polished
1	688162 8	Cell batteries, pair
1	664392 8	Spare Diaphragms, 100 sheets
2	6643851 4	Plate electrode iron 43 x 28 mm
2	6643821 4	Plate electrode copper 43 x 28 mm
1	664391 8	Grindstone
1	610010 8	Laboratory safety goggles
1	6735740 4	Sodium chloride solution, approx. 1 M, 500 ml
1	6742500 4	Phenolphthalein solution, 100 ml Danger H225 H319

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The corrosion of iron

Description

Components of equipment sets

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