Why not use aluminium to make iron?
Aluminum and Iron are both elements. You can't use one to make
another. Well, not without nuclear chemistry.
Did you mean, why not use aluminum to make steel?
The answer is, in a way, we do. Steel is an alloy of iron and carbon or other elements. Aluminum alloys are widely used, in applications such as aircraft and car engines. However, aluminum alloys have different properties than steel - they tend to be more susceptible to heat and not always have the same tensile strength. So engineers have to keep these differences in mind.
Aluminium is paramagnetic, iron is ferromagnetic Aluminium has a low density, iron is more dense Aluminium is not corroded in water, iron is easily corroded The hardness of aluminium is lower The price of aluminium is greater The melting point of iron is significantly greater The thermal and electrical conductivity of aluminium are more important Iron has a greater chemical reactivity ................................................................... etc.
It isn't. You start with aluminium powder and iron oxide and iron oxide (iii). The reaction goes like this : iron(III) oxide + aluminium → aluminium oxide + iron In simpler terms, the application of heat transfers the oxygen atoms from the iron oxide into the aluminium, making aluminium oxide and iron metal. It's a fairly basic principal in chemistry called chemical reduction.
Why is that a piece of aluminium foil exposed to moist air does not corrode even though aluminium is more reactive than iron which easily rust?
Aluminium reacts very rapidly with the oxygen in the air to form a thin film of aluminium oxide covering the entire surface of the aluminium in the foil. This surface is invisible to the eye. Aluminium oxide is very resistant to chemical processes, like corrosion. It protects the aluminium underneath very well, so aluminium does not corrode in moist environments. If the aluminium is scratched, an new aluminium oxide film forms immediately, protecting the scratched…