Contact Process

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Explain the 3 stages of the contact process
1. make sulfur dioxide by burning sulfur in air (S + O2 = SO2) 2. Sulfur dioxide is oxidised using a catalyst (2SO2 + O2 =2SO3) 3. Then the sulfur trioxide that is formed is dissolved in water to make sulfuric acid (SO3 + H2O =H2SO4)
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Which step of the contact process is reversible?
step 2 ( oxidising SO2)
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What temperature is used in step 2 of the contact process and why?
450 degrees C As if the temperature is to low you will get a high yield but a low reaction rate. So this is a compromise.
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How much pressure is used in Step 2?
1 atmosphere ( as pressure is expensive and not really needed)
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What catalyst is used in the contact process and why?
Vanadium pentoxide to speed up the rate of reaction.
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Other cards in this set

Card 2

Front

Which step of the contact process is reversible?

Back

step 2 ( oxidising SO2)

Card 3

Front

What temperature is used in step 2 of the contact process and why?

Back

Preview of the front of card 3

Card 4

Front

How much pressure is used in Step 2?

Back

Preview of the front of card 4

Card 5

Front

What catalyst is used in the contact process and why?

Back

Preview of the front of card 5

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