Question

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2. Explain the extraction of aluminium with reaction and diagram
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Answer 1

Answer:

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Explanation:

Aluminium ore is called bauxite (Al 2O ) . The bauxite is purified to yield a white powder – aluminium oxide (also known as alumina) – from which aluminium can be extracted. The extraction is done by electrolysis , but first the aluminium oxide must be melted so that electricity can pass through it.

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Answer 2

Answer:

The molten aluminium sinks to the bottom of the cell,where it is tapped off.this oxygen reacts with the carbon of the positive electrodes ,forming carbon dioxide ,so they gradually burn away. As a result the positive electrodes have to be replaced frequently .This adds to the cost of process .

Explanation:

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