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LGS GCSE OCR Chemistry A > C6.1 and C6.3 > Flashcards

C6.1 and C6.3 Flashcards

1
Q

What process must be carried out to extract a metal from its ore ?

A

Reduction process

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2
Q

What 2 methods could be used to extract metals from ores

A

Reduction process with Carbon
Electrolysis

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3
Q

How do you extract Iron from its ore ?

A

Blast Furnace by Reduction process

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4
Q

What does NPK stand for?

A

Nitrogen phosphorus potassium

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5
Q

What does a deficiency of nitrogen in plants cause?

A

Poor root growth, yellow leaves

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6
Q

What does activated charcoal do?

A

Attracts the indicator, allowing you to filter and remove it

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7
Q

What is a hazard of using ammonia solution?

A

It releases irritating ammonia gas

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8
Q

What is the colour change of phenolphthalein when acid from a burette is added to alkali in a conical flask?

A

Pink to colourless

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9
Q

What is the catalyst used in the Haber process?

A

Iron

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10
Q

What is the catalyst used for contact process stage 2?

A

Vanadium (V) oxide V2O5

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11
Q

What is the intermediate compound made in stage 3 of the contact process?

A

Oleum H2S2O7

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12
Q

What is the enzyme used in the fermentation method to make ethanol?

A

Yeast

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13
Q

Why can fermentation to make ethanol not be carried out above 35 degrees?

A

The yeast will denature

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14
Q

What is the catalyst used in the hydration method of making ethanol?

A

Phosphoric acid

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15
Q

What compound is found in malachite?

A

Copper carbonate

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16
Q

What is the compound in bauxite?

A

Aluminium oxide

17
Q

What is the compound in haematite?

A

Iron (III) oxide

18
Q

What are the raw materials of the blast furnace?

A

Iron ore, coke, limestone air

19
Q

What is the chemical name for slag?

A

Calcium silicate CaSiO3

20
Q

What is the main reducing agent in the blast furnace?

A

Carbon monoxide

21
Q

What is added to reduce the melting point of aluminium oxide during electrolysis?

A

Molten Cryolite

22
Q

Where is the cathode in the electrolysis of aluminium oxide?

A

The graphite lining of the cell

23
Q

Which electrode is the aluminium formed at during electrolysis of aluminium oxide?

A

Cathode

24
Q

Which gas is released during electrolysis of aluminium oxide?

A

Oxygen

25
Q

Why do the anodes have to be replaced regularly in electrolysis of aluminium oxide?

A

Oxygen reacts with the carbon rods making carbon dioxide

LGS GCSE OCR Chemistry A (7 decks)

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