3.1 Extracting Metals Flashcards

1
Q

What is an ore?

A

A rock that contains enough of a metal to make it worth extracting the metal

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2
Q

What may need to happen to the ore before the metal is extracted?

A

The ore may need to be concentrated

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3
Q

What can mining ores have an effect on?

A

The environment because it produces a large amount of waste

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4
Q

Where are metals usually found?

A

In the earths crust

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5
Q

How are most metals found in the earth?

A

As compounds

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6
Q

How are pure metals extracted? (like gold which is unreacted)

A

By physical methods

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7
Q

How are metal compounds extracted?

A

By chemical reactions

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8
Q

Describe how a metal compound is extracted from the earth?

A

By a displacement reaction, by using a more reactive element than the metal

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9
Q

How are metals less reactive than carbon extracted from their oxides?

A

By heating them with carbon as a reduction reaction takes places because carbon removes the oxygen from the oxide to produce only the metal

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10
Q

What does the method used to extract a metal depend on?

A

Its reactivity

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