In a thermite reaction, aluminum powder and iron (III) oxide react to form “a quality molten steel.” It is important because it can be used to precision-weld two pieces of metal, particularly in railroad tracks. It was developed by Hans Goldschmidt in 1893, and was used to make the tracks more comfortable, safer, and faster.
The reaction is written as: Fe2O3 + 2 Al → Al2O3 + 2 Fe
Aluminum powder and iron oxide react to produce aluminum oxide and iron.
Another useful single replacement reaction is
Cu(s) + 2AgNO3(aq) → 2 Ag(s) + Cu(NO3)2(aq)
We did this experiment earlier in the year.
Copper and silver nitrate react to form silver and copper nitrate.
http://www.chymist.com/Thermite%20reaction.pdf
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