WHY IS ALUMINIUM MORE EXPENSIVE THEN IRON???? HELPP?
Are you sure it is? I do know that back in the day, like up until early 1900's, aluminium was just as valuable as gold. This is because aluminium in it's naturally occurring form is, while very abundunt, almost never found in its pure elemental form, as rare as gold apparently, while iron is much more common in its pure ore form. However, a technology, I believe a form of electrolysis, was discovered to be able to separate aluminium from its ore in the early 1900's. But now, since aluminium is relatively common, the price is obviously much cheaper, in addition, most aluminium we see today has been recycled. So basically, if aluminium really is more expensive than iron, the reason is simple, it is much harder to get.
The rest is contamination from somewhere in the process. They don't purify it further because the cost of of additional process controls and special equipment isn't worth the benefit. 99.9% pure is pure enough for almost all industrial and jewelery applications. You can buy purer gold (99.999%) for scientific purposes, but it's much more expensive.
Pure gold is 24 carats not 22.
Although aluminium is more common it takes much more energy to extract aluminium from its ore, so you are paying for the energy the smelting plant had to use.
Aluminum is made from an ore called Bauxite. The Aluminum is found in the form of an oxide (Al2O3). To remove the oxygen from the molecule you must provide large amounts of electricity and a reducing atmosphere, an expensive process. Iron is made from an ore containing iron in the form of an oxide (Fe2O3). to remove the oxygen from the molecule a hot gas is passed through the iron ore mixed with coke, a carbon carrying form of coal which produces carbon monoxide, a reducing gas, which scavenges the oxygen producing iron, plus impurities. This is a high volume process which utilizes cheaper and more abundant raw materials, therefore Aluminum is more expensive to produce in any comparable quantity,
