Redox reactions between metals and metal oxides (thermite process) Principle The experiments described here are highly suitable for demonstrating the different affinity of various metals in view of oxygen. The less noble a metal is the higher its affinity to oxygen and the more thermal energy is released during its oxidation. The technical importance of the thermite process for the welding of iron parts is that it is relatively easy to produce large amounts of liquid iron and, thereby, to fill wider weld grooves. This is why this process is mainly used for welding thick steel beams, rail tracks, and machine parts. Benefits - Impressive experiment to the thermite process
- Precise weighting information ensures successful execution
Tasks - Reduction of copper oxide with iron.
- Reduction of iron oxide with aluminium (thermite process, aluminothermics).
Learning objectives - Redox reaction
- Thermite process
- Metals
- Welding of iron
- Aluminothermics
- Iron
- Aluminium
Necessary accessories - Appropriate starter-match for a thermit-reaction (special thermit starter match, sparkler, magnesium-rod or a gas torch with propane and oxygen)
- Precision balance 620g/0.001g
Retort stand, h = 750 mm
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37694-00
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1
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Right angle boss-head clamp
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37697-00
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1
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Universal clamp
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37715-01
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1
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Ring with boss head, i. d. = 10 cm
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37701-01
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2
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Test tube, Fiolax®, various lengths, 100 pcs.
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36305-10
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1
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Test tube, laboratory glass, various lengths, 100 pcs.
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37656-10
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1
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Test tube rack, wood, for 6 tubes d= 22mm
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MAU-20042200
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1
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Mortar with pestle, 150 ml, porcelain
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32604-00
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1
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Magnet, d = 10 mm, l = 200 mm
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06311-00
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1
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Iron basin,hemispherical, d 160mm
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33209-00
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1
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Flower pot, clay, d. approx.12 cm
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64123-00
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1
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Hammer, engineers, 200 g
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40320-00
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1
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Teclu burner, DIN, natural gas
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32171-05
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1
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Safety gas tubing, DVGW, sold by metre
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39281-10
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1
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Hose clip f.12-20 diameter tube
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40995-00
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2
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Lighter f.natural/liquified gases
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38874-00
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1
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Test tube holder, up to d 22mm
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38823-00
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1
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Crucible tongs, 200 mm, stainless steel
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33600-00
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1
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Spoon, special steel
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33398-00
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1
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Copper-II oxide,powder 100 g
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30125-10
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1
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Iron-III oxide, red 500 g
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48114-50
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1
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Iron powder xtra pure 1000 g
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30068-70
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1
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Aluminium, granulated 250 g
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30919-25
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1
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Hydrochloric acid 37 %, 1000 ml
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30214-70
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1
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Water, distilled 5 l
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31246-81
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1
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Quartz sand, coarse, 1000 g
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CHE-881318041
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1
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