A bottle of wine is opened and left exposed to the air for a few days - Edexcel - GCSE Chemistry - Question 4 - 2013 - Paper 1
Question 4
A bottle of wine is opened and left exposed to the air for a few days.
The ethanol in the wine reacts with oxygen from the air to form ethanoic acid.
Complete the se... show full transcript
Worked Solution & Example Answer:A bottle of wine is opened and left exposed to the air for a few days - Edexcel - GCSE Chemistry - Question 4 - 2013 - Paper 1
Step 1
In this reaction the ethanol is
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Answer
The ethanol in the reaction is oxidised. This means that during the chemical reaction with oxygen, ethanol loses electrons, resulting in the formation of ethanoic acid. Therefore, the correct answer is C.
Step 2
(b) Vinegar is a dilute solution of ethanoic acid.
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Answer
Vinegar serves as a common example of a dilute solution containing ethanoic acid, which gives it its characteristic sour flavor. Ethanoic acid, also known as acetic acid, is what makes vinegar acidic.
