Cambridge International AS & A Level
* 9 6 6 3 5 2 3 0 3 4 *
CHEMISTRY 9701/52
Paper 5 Planning, Analysis and Evaluation May/June 2023
1 hour 15 minutes
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
● Answer all questions.
● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
● Write your name, centre number and candidate number in the boxes at the top of the page.
● Write your answer to each question in the space provided.
● Do not use an erasable pen or correction fluid.
● Do not write on any bar codes.
● You may use a calculator.
● You should show all your working and use appropriate units.
INFORMATION
● The total mark for this paper is 30.
● The number of marks for each question or part question is shown in brackets [ ].
● The Periodic Table is printed in the question paper.
● Important values, constants and standards are printed in the question paper.
1 Three students are asked to prepare samples of benzoic acid, C6H5COOH, from the alkaline
hydrolysis of methyl benzoate, C6H5COOCH3. Sodium benzoate, C6H5COONa, is the salt formed,
which is then acidified with hydrochloric acid to form C6H5COOH.
C6H5COOCH3(l) + NaOH(aq) C6H5COONa(aq) + CH3OH(l)
C6H5COONa(aq) + HCl (aq) C6H5COOH(s) + NaCl (aq)
The students use the following method.
step 1 Put 1.242 g of liquid methyl benzoate into a 50 cm3 round-bottomed flask.
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