Coconut oil contains a mixture of compounds - Scottish Highers Chemistry - Question 4 - 2022
Question 4
Coconut oil contains a mixture of compounds.
(a) Propyl octanoate is a compound found in coconut oil.
(i) Name the functional group in propyl octanoate.
(ii) Draw... show full transcript
Worked Solution & Example Answer:Coconut oil contains a mixture of compounds - Scottish Highers Chemistry - Question 4 - 2022
Step 1
Name the functional group in propyl octanoate.
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Answer
The functional group in propyl octanoate is an ester.
Step 2
Draw a structural formula for the carboxylic acid formed by hydrolysis of propyl octanoate.
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Answer
The structural formula for the carboxylic acid formed from the hydrolysis of propyl octanoate is:
O
||
H -- C -- OH
|
H H H
Step 3
Suggest a name for the other product.
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Answer
The other product formed from the hydrolysis of an isomer of propyl octanoate is likely hexanoic acid.
Step 4
Using the graph and the information in the table, predict the number of carbons in glyceryl trilaurate.
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Answer
Based on the information from the chromatography experiment and typical fatty acid chain lengths, glyceryl trilaurate likely contains 35-45 carbons.
Step 5
Identify the compound listed in the table which is the most unsaturated.
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Answer
The most unsaturated compound listed in the table is glyceryl trilinoleate.
Step 6
State how emulsifiers are made from edible oils.
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Answer
Emulsifiers are made from edible oils by reacting these oils with glycerol.
Step 7
Explain fully how emulsifiers prevent non-polar and polar liquids from separating into layers.
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Answer
Emulsifiers contain both hydrophilic and hydrophobic parts. The hydrophilic part interacts with water (polar liquids), while the hydrophobic part interacts with oils (non-polar liquids). This dual nature stabilizes the mixture, preventing the two liquids from separating into distinct layers.
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