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You performed a first-hand investigation to prepare an ester by reflux - HSC - SSCE Chemistry - Question 21 - 2003 - Paper 1
Question 21
You performed a first-hand investigation to prepare an ester by reflux. (a) Identify the products formed when propanoic acid and butanol are refluxed with acid cata... show full transcript
Worked Solution & Example Answer:You performed a first-hand investigation to prepare an ester by reflux - HSC - SSCE Chemistry - Question 21 - 2003 - Paper 1
Step 1
Step 2
Draw a fully labelled diagram of the equipment assembled for use.
Answer
To prepare an ester via reflux, the following equipment is typically used:
- Round-bottom flask for the reaction mixture.
- Reflux condenser to prevent loss of vapors, ensuring they return to the flask.
- Heating mantle or hotplate for consistent heating.
- Thermometer to monitor temperature.
A fully labelled diagram of this setup would include these components, clearly showing how they connect and the flow of vapors.
Step 3
Outline the advantages of using reflux to prepare the ester.
Answer
One of the main advantages of using reflux in ester preparation is that it allows the reaction to proceed at a constant temperature, preventing the loss of volatile components. This ensures that the reactants stay in the reaction mixture for a longer time, increasing the yield of the ester. Additionally, reflux helps to ensure complete reaction, reducing the need for separate distillation processes. This makes it more efficient and convenient as it minimizes the risk of overheating and thermal decomposition of the reactants.