4-hydroxybenzoic acid
4-hydroxybenzoic acid can react with alcohols to form compounds known as parabens - Scottish Highers Chemistry - Question 11 - 2015
Question 11
4-hydroxybenzoic acid
4-hydroxybenzoic acid can react with alcohols to form compounds known as parabens.
(a) Name the functional group circled in the structure of ... show full transcript
Worked Solution & Example Answer:4-hydroxybenzoic acid
4-hydroxybenzoic acid can react with alcohols to form compounds known as parabens - Scottish Highers Chemistry - Question 11 - 2015
Step 1
Name the functional group circled in the structure of 4-hydroxybenzoic acid.
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Answer
The functional group circled in the structure of 4-hydroxybenzoic acid is the carboxyl (acid) group.
Step 2
Name the type of reaction taking place when parabens are formed.
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Answer
The type of reaction taking place when parabens are formed is esterification or condensation.
Step 3
Draw the paraben formed when 4-hydroxybenzoic acid reacts with ethanol.
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Answer
The paraben formed when 4-hydroxybenzoic acid reacts with ethanol is illustrated below:
O
||
C - O - CH2 - CH3
|
C6H4 - COOH
This structure represents the ester formed from the reaction.
Step 4
State a conclusion that can be drawn from the information in the table.
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Answer
As the molecular size (number of carbon atoms) increases, the absorption of parabens decreases.
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