AQA A LEVEL CHEMISTRY PAPER 3 QUESTION PAPER 2023 (7405/3)

4.6

AQA A LEVEL CHEMISTRY PAPER 3 QUESTION PAPER 2023 (7405/3). DOWNLOAD OFFICIAL AND VERIFIED AQA A LEVEL CHEMISTRY PAPER 3 QUESTION PAPER 2023 ON www.leakedexams....

View example

Details

Comments

Reviews

AQA A LEVEL CHEMISTRY PAPER 3 QUESTION PAPER 2023 (7405/3). DOWNLOAD OFFICIAL AND VERIFIED AQA A LEVEL CHEMISTRY PAPER 3 QUESTION PAPER 2023 ON www.leakedexams.com.

Â 1 Ethyl ethanoate can be made by reacting ethanol with ethanoic acid in the presence
of concentrated sulfuric acid.
Method
1. A mixture of ethanol, ethanoic acid, and concentrated sulfuric acid, with
anti-bumping granules, is heated under reflux for 10 minutes.
2. The apparatus is rearranged for distillation.
3. The mixture is heated to collect the liquid that distils between 70 and 85 Â°C
4. The distillate is placed in a separating funnel. Aqueous sodium carbonate is
added, and a stopper is placed in the funnel. The mixture is shaken, releasing
pressure as necessary.
5. The lower aqueous layer is removed and the upper organic layer is placed in a
small conical flask.
6. Anhydrous calcium chloride is added to the sample in the conical flask. The
flask is shaken well and left for a few minutes.
7. The liquid from the flask is redistilled and the distillate is collected between
74 and 79 Â°C
0 1 . 1 State the role of concentrated sulfuric acid in this reaction.
[1 mark]
0 1 . 2 The reaction mixture is flammable.
Suggest how the reaction mixture should be heated in step 1.
[1 mark]

No review has been posted for this item yet

Specifications

Author	OCR KING
Published	30 Jul 2024
Included files	PDF
7405 7405/3 AQA A LEVEL CHEMISTRY PAPER 3 QUESTION PAPER 2023 AQA A LEVEL CHEMISTRY PAPER 3 AQA A LEVEL CHEMISTRY PAPER 3 2023 AQA A LEVEL CHEMISTRY PAPER 3 AQA AQA CHEMISTRY 2023 AQA CHEMISTRY CHEMISTRY 2023 CHEMISTRY