, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel
Level 3 GCE
Time 2 hours 30 minutes
Paper
reference 9CH0/03
Chemistry
Advanced
PAPER 3: General and Practical Principles in Chemistry
Candidates must have: Scientific calculator Total Marks
Data Booklet
Ruler
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer the questions in the spaces provided
Answer all questions.
– 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
• Show
each question carefully before you start to answer it.
all your working in calculations and include units where appropriate.
• Check your answers if you have time at the end.
• Good luck with your examination.
Turn over
P67806A
©2021 Pearson Education Ltd.
1/1/1/1/1/1
, Answer ALL the questions.
Write your answers in the spaces provided.
1 This question is about chlorine.
(a) Chlorine has two isotopes with mass numbers 35 and 37.
35
(i) Complete the table to show the numbers of subatomic particles in a Cl atom
and a 37Cl− ion.
(2)
Particle Protons Neutrons Electrons
35
Cl atom
37
Cl− ion
(ii) A sample of chlorine contained 75 % of 35C l and 25 % of 37C l.
Complete the mass spectrum to show the peaks you would expect for the
molecular ion Cl+ 2from this sample of chlorine gas.
(2)
100
90
80
70
60
Relative 50
abundance
40
30
20
10
0
69 70 71 72 73 74 75
m/z
, (b) Write the formula of potassium chlorate(V).
(1)
.... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . .. ...... . .... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. ....... ... ... . .... ... .
(c) Write the equation for the first electron affinity of chlorine. Include state symbols.
(2)
(d) The standard electrode potential for the chlorine / chloride ion half-cell is
½Cl2(aq) e− ⇌ Cl−(aq) EOcell 1.36 V
(i) Identify an oxidising agent from the Data Booklet that will convert
chloride ions into chlorine under standard conditions.
(1)
.... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . .. ...... . .... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. ....... ... ... . .... ... .
(ii) Calculate the value of EOcell for the reaction in (d)(i).
(1)
(Total for Question 1 = 9 marks)
3
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel
Level 3 GCE
Time 2 hours 30 minutes
Paper
reference 9CH0/03
Chemistry
Advanced
PAPER 3: General and Practical Principles in Chemistry
Candidates must have: Scientific calculator Total Marks
Data Booklet
Ruler
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer the questions in the spaces provided
Answer all questions.
– 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
• Show
each question carefully before you start to answer it.
all your working in calculations and include units where appropriate.
• Check your answers if you have time at the end.
• Good luck with your examination.
Turn over
P67806A
©2021 Pearson Education Ltd.
1/1/1/1/1/1
, Answer ALL the questions.
Write your answers in the spaces provided.
1 This question is about chlorine.
(a) Chlorine has two isotopes with mass numbers 35 and 37.
35
(i) Complete the table to show the numbers of subatomic particles in a Cl atom
and a 37Cl− ion.
(2)
Particle Protons Neutrons Electrons
35
Cl atom
37
Cl− ion
(ii) A sample of chlorine contained 75 % of 35C l and 25 % of 37C l.
Complete the mass spectrum to show the peaks you would expect for the
molecular ion Cl+ 2from this sample of chlorine gas.
(2)
100
90
80
70
60
Relative 50
abundance
40
30
20
10
0
69 70 71 72 73 74 75
m/z
, (b) Write the formula of potassium chlorate(V).
(1)
.... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . .. ...... . .... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. ....... ... ... . .... ... .
(c) Write the equation for the first electron affinity of chlorine. Include state symbols.
(2)
(d) The standard electrode potential for the chlorine / chloride ion half-cell is
½Cl2(aq) e− ⇌ Cl−(aq) EOcell 1.36 V
(i) Identify an oxidising agent from the Data Booklet that will convert
chloride ions into chlorine under standard conditions.
(1)
.... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . .. ...... . .... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. ....... ... ... . .... ... .
(ii) Calculate the value of EOcell for the reaction in (d)(i).
(1)
(Total for Question 1 = 9 marks)
3
