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EDEXCEL A LEVEL 2023 CHEMISTRY 9CHO A LEVEL JUNE 2023 PAPER 3 GENERAL AND PRACTICAL PRINCIPLES IN CHEMISTRY $6.99   Add to cart
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EDEXCEL A LEVEL 2023 CHEMISTRY 9CHO A LEVEL JUNE 2023 PAPER 3 GENERAL AND PRACTICAL PRINCIPLES IN CHEMISTRY
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EDEXCEL A LEVEL 2023 CHEMISTRY 9CHO A LEVEL JUNE 2023 PAPER 3 GENERAL AND PRACTICAL PRINCIPLES IN CHEMISTRY

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  • February 1, 2024
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  • 2023/2024
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  • edexcel gcse 2023 paper markscheme

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, Please check the examination details below before entering your candidate information
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Centre Number Candidate Number




Pearson Edexcel Level 3 GCE
Friday 23 June 2023
Morning (Time: 2 hours 30 minutes) Paper
reference 9CH0/03
Chemistry
 



Advanced
PAPER 3: General and Practical Principles in Chemistry

You must have: Total Marks
Scientific calculator, Data Booklet, ruler


Instructions
• Use black ink or ball-point pen.
• IfFillpencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• centre number
in the boxes at the top of this page with your name,
and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.

Information
• The total mark for this paper is 120.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• ability
For the question marked with an asterisk (*), marks will be awarded for your
to structure your answer logically, showing the points that you make are
related or follow on from each other where appropriate.
• A Periodic Table is printed on the back cover of this paper.

Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• Check your answers if you have time at the end. Turn over



*P71914A0132*
P71914A
©2023 Pearson Education Ltd.

N:1/1/1/1/1/1/

, Answer ALL questions. Write your answers in the spaces provided.

1 Alkanes are often used as fuels.
(a) Complete the equation for the complete combustion of hexane.
State symbols are not required.
(1)

C6H14 + ............... O2 → ............... CO2 + ............... H2O

(b) Identify two pollutants produced from the incomplete combustion of a pure
sample of pentane.
(2)

. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .



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(c) Explain the problem which results from sulfur impurities in fuels.
(2)

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(d) Adding cyclic hydrocarbons to fuels results in more efficient combustion.
These compounds can be made by reforming straight‑chain alkanes.
Write an equation for the reforming of pentane into a cyclic hydrocarbon, using
skeletal formulae for the organic compounds.
State symbols are not required.
(2)




(Total for Question 1 = 7 marks)

2
*P71914A0232* 

, 2 This question is about some reactions of the elements of Group 1 and Group 2 of the
Periodic Table and their compounds.
(a) Group 2 metals react vigorously with oxygen when heated.
(i) Write the equation for the reaction between magnesium and oxygen.
Include state symbols.
(1)




(ii) Explain the trend in reactivity of the elements down Group 2.
(3)

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(b) (i) State the trend in solubility of the Group 2 sulfates.
(1)

. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .



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(ii) Explain why the reaction between calcium and excess sulfuric acid stops
before all of the metal has reacted.
(2)

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 *P71914A0332* Turn over

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