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The formula of a molecule of ethanol is C2H5OH - Edexcel - GCSE Chemistry - Question 6 - 2016 - Paper 1
Question 6
The formula of a molecule of ethanol is C2H5OH. (i) State how you know, from its formula, that ethanol is not a hydrocarbon. (ii) A dilute solution of ethanol can ... show full transcript
Worked Solution & Example Answer:The formula of a molecule of ethanol is C2H5OH - Edexcel - GCSE Chemistry - Question 6 - 2016 - Paper 1
Step 1
Step 2
Describe how a dilute solution of ethanol can be produced.
Answer
To produce a dilute solution of ethanol, sugar can be dissolved in water. After that, yeast is added to the solution to facilitate fermentation. The mixture should be left in a warm place to initiate the fermentation process, during which the yeast converts the sugar into ethanol and carbon dioxide. This process can occur in the absence of air, allowing the fermentation to take place effectively.
Step 5
Name and draw the structures of some alkanes and of some alkenes.
Answer
Alkanes:
- Methane: ( CH_4 )
- Ethane: ( C_2H_6 )
- Propane: ( C_3H_8 )
- Butane: ( C_4H_{10} )
Alkenes:
- Ethene: ( C_2H_4 )
- Propene: ( C_3H_6 )
Alkanes have the general formula ( C_nH_{2n+2} ) and are saturated with only single bonds. Alkenes have the general formula ( C_nH_{2n} ), featuring at least one double bond between carbon atoms. Successive members of both homologous series differ by ( CH_2 ) in their molecular formula.