Chemistry C1 5.5 Ethanol

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How can ethanol be made?
By fermenting sugar using enzymes in yeast and it can also be made by hydration of ethene with steam in the presence of a catalyst.
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What does using ethene to make ethanol require?
The use of non-renewable crude oil.
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What does producing ethanol through fermentation require?
Renewable plant material.
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What is the formula of ethanol?
C_(2)H_(6)O. It is often written as C_(2)H_(5)OH, this shows the OH group in the molecule and that means it is an alcohol.
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How can sugar from plants using yeast produce ethanol?
Through fermentation.
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What causes the sugar to convert to ethanol and carbon dioxide and what is this method used to produce?
Enzymes in the yeast, this is used to produce alcoholic drinks.
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How is ethanol made by the hydration of ethene?
Ethene is reacted with steam at a high temperature in the presence of a catalyst.
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How is ethene obtained?
From crude oil by cracking.
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How is pure ethanol acquired through the method of fermentation?
Fermentation is done at room temperature, but can only produce a dilute aqueous solution of ethanol, the ethanol must be separated from the solution by fractional distillation to give pure ethanol.
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What does ethanol produced from ethene use?
A non-renewable source, crude oil.
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The reaction of using ethene to produce ethanol can be run continuously, but what does it require?
A high temperature, although it does produce pure ethanol.
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What is the word equation for the fermentation of sugar using yeast?
Sugar/glucose (arrow symbol) ethanol + carbon dioxide.
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What s the word equation for the hydration of ethene?
Ethene + steam (arrow symbol) ethanol.
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**YOU SHOULD BE ABLE TO DESCRIBE THE TWO WAYS OF MAKING ETHANOL**
**YOU SHOULD BE ABLE TO WRITE BALANCED SYMBOL EQUATIONS FOR THE REACTIONS**
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Card 2

Front

What does using ethene to make ethanol require?

Back

The use of non-renewable crude oil.

Card 3

Front

What does producing ethanol through fermentation require?

Back

Preview of the front of card 3

Card 4

Front

What is the formula of ethanol?

Back

Preview of the front of card 4

Card 5

Front

How can sugar from plants using yeast produce ethanol?

Back

Preview of the front of card 5
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