GCSE c4 OCR Contact process

GCSE revision of The Contact Process

  • Created by: harry
  • Created on: 01-04-13 16:27
What is the contact process used to make?
Sulfuric acid
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Describe the first stage
Sulfur is burnt in oxygen to make sulfur dioxide
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Describe the second stage
The sulfur dioxide is oxidised to make sulfur trioxide
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Describe the third stage
Sulfur trioxide is dissolved in sulfuric acid then diluted in water
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What are the 3 conditions that affect the second stage?
Temperature, pressure and Catalyst
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How does the temperature affect it?
Decreasing the temperature would increase the yield (equilibrium moved to the right) but the rate of reaction would be reduced
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What temperature is used?
450 degrees
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How does pressure affect the reaction
Increasing the pressure would move the equilibrium to the right but it is already to the right.
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What pressure is used?
Because increasing the pressure is expensive, 1 atmosphere is used
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How does a catalyst affect the reaction
It increases the rate of reaction
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What type of catalyst is used?
A vanadium pentoxide catalyst
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Other cards in this set

Card 2

Front

Describe the first stage

Back

Sulfur is burnt in oxygen to make sulfur dioxide

Card 3

Front

Describe the second stage

Back

Preview of the front of card 3

Card 4

Front

Describe the third stage

Back

Preview of the front of card 4

Card 5

Front

What are the 3 conditions that affect the second stage?

Back

Preview of the front of card 5
View more cards

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