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The structure of a molecule of an ester, ethyl ethanoate, is shown - Edexcel - GCSE Chemistry - Question 1 - 2015 - Paper 1
Question 1
The structure of a molecule of an ester, ethyl ethanoate, is shown. (a) (i) Give the molecular formula of this compound. (ii) Write the word equation for the react... show full transcript
Worked Solution & Example Answer:The structure of a molecule of an ester, ethyl ethanoate, is shown - Edexcel - GCSE Chemistry - Question 1 - 2015 - Paper 1
Step 1
Step 2
Write the word equation for the reaction of ethanol with another compound to form ethyl ethanoate and another product.
Answer
The word equation for the reaction is:
ethanol + ethanoic acid → ethyl ethanoate + water.
This reaction describes the process of esterification between ethanol and ethanoic acid.
Step 3
Suggest why, despite this hazard, it is still safe to use ethyl ethanoate in sweets.
Answer
Despite the hazard of dizziness or fainting from inhaling ethyl ethanoate vapors, it is considered safe to use in sweets because the concentration of the substance is very low in food products, and the exposure is typically minimal. Additionally, it is quickly metabolized and eliminated by the body.
Step 4
Step 5
Describe how a pure sample of the white solid can be obtained from this mixture.
Answer
To obtain a pure sample of the white solid (soap), one can perform filtration. First, pour the mixture through a filter paper in a funnel. The white solid will be collected on the filter paper while the liquid will pass through. After filtration, wash the collected solid with distilled water to remove any impurities, and then allow it to dry.
Step 6