AQA A-level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Question Paper + Mark scheme [MERGED] June 2022

AQA

A-level

CHEMISTRY

7405/2

Paper 2 Organic and Physical Chemistry

Question Paper + Mark scheme [MERGED]

June 2022

*Jun227405201*

IB/M/Jun22/E9 7405/2

For Examiner’s Use

Question Mark

1

2

3

4

5

6

7

8

9

10

TOTAL

Time allowed: 2 hours

Materials

For this paper you must have:

• the Periodic Table/Data Booklet, provided as an insert (enclosed)

• a ruler with millimetre measurements

• a scientific calculator, which you are expected to use where appropriate.

Instructions

• Use black ink or black ball-point pen.

• Fill in the boxes at the top of this page.

• Answer all questions.

• You must answer the questions in the spaces provided. Do not write outside

the box around each page or on blank pages.

• If you need extra space for your answer(s), use the lined pages at the end of

this book. Write the question number against your answer(s).

• All working must be shown.

• Do all rough work in this book. Cross through any work you do not

want to be marked.

Information

• The marks for questions are shown in brackets.

• The maximum mark for this paper is 105.

Please write clearly in block capitals.

Centre number Candidate number

Surname

Forename(s)

Candidate signature

I declare this is my own work.

A-level

CHEMISTRY

Paper 2 Organic and Physical Chemistry

2

*02*

IB/M/Jun22/7405/2

Do not write

outside the

Answer all questions in the spaces provided. box

0 1 An acidified solution of butanone reacts with iodine as shown.

CH3CH2COCH3 + I2 → CH3CH2COCH2I + HI

0 1 . 1 Draw the displayed formula for CH3CH2COCH2I

Give the name of CH3CH2COCH2I

[2 marks]

Displayed formula

Name

3

*03*

Turn over ►

IB/M/Jun22/7405/2

Do not write

outside the

box 0 1 . 2 The rate equation for the reaction is

rate = k[CH3CH2COCH3][H+]

Table 1 shows the initial concentrations used in an experiment.

Table 1

CH3CH2COCH3 I2 H+

Initial concentration / mol dm−3 4.35 0.00500 0.825

The initial rate of reaction in this experiment is 1.45×10−4 mol dm−3 s−1

Calculate the value of the rate constant, k, for the reaction and give its units.

[3 marks]

k

Units

0 1 . 3 Calculate the initial rate of reaction when all of the initial concentrations are halved.

[1 mark]

Initial rate of reaction mol dm−3 s−1

Question 1 continues on the next page

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