C6 - Alcohols Flashcards
1
Q
What are the three main uses of ethanol?
A
- in alcoholic drinks
- as a solvent
- in petrol replacements
2
Q
What does fermentation require?
A
- sugar
- water
- yeast enzymes
- no oxygen
- temperature between 25c and 50c
3
Q
Why can ethanol be called renewable?
A
This is because it is made from plants which are renewable resources.
4
Q
What is the word equation for ethanol?
A
Glucose = Ethanol + Carbon Dioxide
5
Q
Why is fermentation carried out under controlled conditions?
A
- if the temperature is too cold the enzymes are inactive
- if the temperature is too hot the enzymes will become denatured
- is air is present then ethanoic acid with be produced
6
Q
What is the other way of producing ethanol?
A
Reacting ethene (made from crude oil) with water.
7
Q
What is the word equation for hydration of ethene?
A
ethene + water = ethanol
8
Q
What are the advantages to making ethanol by fermentation?
A
- it is a renewable resource
- it is carbon neutral
- household waste can be used to make ethanol, reducing the need for landfill sites
9
Q
What are the disadvantages of fermentation?
A
- large areas of natural forest may be cut down to make room for the crops
- the land might be better used for growing food for the local population rather than cash crops
- its not an efficient process
10
Q
What are the advantages to the hydration of ethene?
A
- it is cheaper
- more economic than fermentation
11
Q
What are the disadvantages to the hydration of ethene?
A
- it is non-renewable
