Question

name one other metal that you would expect to be extracted by same method​

Answer 1

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Iron and aluminium

The method used to extract metals depends on the reactivity of the metal. Metals are used for a variety of purposes. An alloy is a mixture of a metal and another element.

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Chemistry (Single Science)Metals

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Page 2 of 6

Metal extraction and the reactivity series

The method used to extract a metal from its ore depends upon the stability of its compound in the ore, which in turn depends upon the reactivity of the metal:

The oxides of very reactive metals, such as aluminium, form stable oxides and other compounds. A lot of energy is needed to reduce them to extract the metal.

The oxides of less reactive metals, such as iron, form less stable oxides and other compounds. Relatively little energy is needed to reduce them to extract the metal.

So, the method of extraction of a metal from its ore depends on the metal's position in the reactivity series.

Reactivity and extraction method

The table displays some metals in decreasing order of reactivity and the methods used to extract them.

PotassiumElectrolysis

SodiumElectrolysis

CalciumElectrolysis

MagnesiumElectrolysis

AluminiumElectrolysis

(Carbon)(Non-metal)

ZincReduction by carbon or carbon monoxide

IronReduction by carbon or carbon monoxide

TinReduction by carbon or carbon monoxide

LeadReduction by carbon or carbon monoxide

(Hydrogen)(Non-metal)

CopperVarious chemical reactions

SilverVarious chemical reactions

GoldVarious chemical reactions

PlatinumVarious chemical reactions

We can see from the table that reactive metals, such as aluminium, are extracted by electrolysis, while a less reactive metal, such as iron, may be extracted by reduction with carbon.

Because gold it is so unreactive, it is found as the native metal and not as a compound. It does not need to be chemically separated. However, chemical reactions may be needed to remove other elements that might contaminate the metal.

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Answer 2

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