This question is about organic compounds - AQA - GCSE Chemistry - Question 5 - 2015 - Paper 3
Question 5
This question is about organic compounds.
Ethanol is an alcohol.
One use of ethanol is in alcoholic drinks.
Give two other uses of ethanol.
5 (b) Which gas is prod... show full transcript
Worked Solution & Example Answer:This question is about organic compounds - AQA - GCSE Chemistry - Question 5 - 2015 - Paper 3
Step 1
Give two other uses of ethanol.
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Answer
Ethanol can be used as a fuel, providing an alternative energy source that is renewable.
It serves as a solvent in various industrial and laboratory applications.
Step 2
Which gas is produced when sodium reacts with ethanol?
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Answer
The gas produced when sodium reacts with ethanol is hydrogen.
Step 3
What type of reaction produces ethanoic acid from ethanol?
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The reaction that produces ethanoic acid from ethanol is an oxidation reaction.
Step 4
Complete the displayed structure of ethanoic acid.
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The complete structure of ethanoic acid is:
H O
| ||
H--C---C--OH
|
H
Step 5
Explain why the solution of ethanoic acid has a higher pH than the solution of hydrochloric acid.
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Ethanoic acid is a weak acid, which means it does not completely ionize in solution. As a result, it has a lower concentration of hydrogen ions compared to hydrochloric acid, which is a strong acid and completely ionizes, leading to a higher concentration of hydrogen ions and consequently a lower pH.
Step 6
Name the ester made from ethanol and ethanoic acid.
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The ester formed from the reaction of ethanol and ethanoic acid is ethyl ethanoate.
Step 7
What type of chemical is used as a catalyst in this reaction?
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An acid, commonly sulfuric acid, is used as a catalyst in this esterification reaction.
Step 8
What does volatile mean?
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Volatile means that a substance easily evaporates at normal temperatures, which is a characteristic of esters used in perfumes.
