name an ore for al,fe

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Solution

Ore: Ores are concentrations of minerals in rock that are high enough to be economically extracted for use.
Ores of Aluminum:
Silicates:
Kaolin Al₂O₃.2SiO₂.2H₂O
Potash felspar K₂O. Al₂O₃.6SiO₂
Potash mica K₂O.3Al₂O₃.6SiO₂.2H₂O
Oxides:
Bauxite Al₂O₃.nH₂O
Gibbisite Al₂O₃.3H₃O
Diaspore Al₂O₃.H₂O
Corundum Al₂O₃
Fluorides:
Cryolite Na₃AlF₆
Sulphates:
Alunite K₂SO₄.Al₂(SO)₃.4Al(OH)₃
But Aluminum is mainly extracted from 'Bauxite' ore.
Ores of iron:
Hematite(Fe₂O₃)
Magnetite (Fe₃O₄)
Goethite (FeO(OH))
Limonite (FeO(OH).n(H₂0))
Siderite (FeCO₃)
Hematite is used for extraction of iron.

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{Fe}_{2} O_{3} + 2 Al \to {Al}_{2} O_{3} + 2 Fe

A l | A l^{3 +} (0.1 M) | | F e^{2 +} (0.2 M) | F e

E_{A l^{3 +} / A l}^{o} = - 1.66

E_{F e^{2 +} / F e}^{o} = - 0.44 V

Arrange the following elements in the order of their abundance in Earth's crust:

Aluminium - $A l$ , Silicon - $S i$ , Oxygen - $O$ , Iron - $F e$ .

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