Please check the examination details below before entering your
candidate information
Candidate surnameOther names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Friday 23 June 2023
9CH0/03
Paper
Morning (Time: 2 hours 30 minutes)
reference
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).
•your name,boxes
in the at the top of this page with
centre number and candidate
• number.
Answer all
• Answer the questions in the spaces
questions.
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.
•For the question marked with an asterisk (*), marks will be
awarded for your ability 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 Turn over
the end.
, 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 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)
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
(ii) Explain why the reaction between calcium and excess sulfuric
acid stops before all of the metal has reacted.
(2)
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candidate information
Candidate surnameOther names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Friday 23 June 2023
9CH0/03
Paper
Morning (Time: 2 hours 30 minutes)
reference
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).
•your name,boxes
in the at the top of this page with
centre number and candidate
• number.
Answer all
• Answer the questions in the spaces
questions.
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.
•For the question marked with an asterisk (*), marks will be
awarded for your ability 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 Turn over
the end.
, 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)
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
(c) Explain the problem which results from sulfur
impurities in fuels. (2)
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
(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 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)
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
(b) (i) State the trend in solubility of the Group
2 sulfates. (1)
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
(ii) Explain why the reaction between calcium and excess sulfuric
acid stops before all of the metal has reacted.
(2)
............................................................................................................................... ................................................................................
............................................... ......................
............................................................................................................................... ................................................................................
............................................... ......................
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