2025 Pearson Edexcel Level 1/Level 2 GCSE (9–1) PAPER 5 Higher Tier
Combined Science Question Paper and Marking Scheme
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
Friday 13 June 2025
Morning (Time: 1 hour 10 minutes) Paper
reference 1SC0/2CH
Combined Science
PAPER 5
Higher Tier
You must have: Total Marks
Calculator, ruler, Periodic Table (enclosed)
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
•• Calculators may be used.
Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
•• The total mark for this paper is 60.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Instructure
questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
Advice
• Try
Read each question carefully before you start to answer it.
•• Checkto answer every question.
your answers if you have time at the end.
Turn over
P75517RRA
©2025 Pearson Education Ltd.
,Y:1/1/1/1/1/1
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 When solutions P and Q are mixed together, a purple mixture forms.
This mixture slowly becomes colourless.
(a) A student pours 25 cm3 of solution P into a conical flask and then adds
25 cm3 of solution Q.
The student uses a beaker to measure out these volumes.
Name a piece of apparatus that could be used to measure these volumes
more accurately.
(1)
............................................................................................................................... ............................................................................................................................... ......................
(b) The student investigates this reaction using the apparatus shown in Figure 1.
The student measures the time taken for the cross to become visible.
The experiment is repeated at different temperatures.
DO NOT WRITE IN THIS AREA
eye
reaction mixture
paper with black cross
Figure 1
Figure 2 shows the results.
temperature in °C time in s
DO NOT WRITE IN THIS AREA
20 45
40 19
60 10
Figure 2
2
, (i) The concentrations of the solutions are kept constant in each experiment.
State one other variable that should be kept constant.
DO NOT WRITE IN THIS AREA
(1)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
(ii) State, and explain in terms of particles, how the time taken for the cross to
become visible would change if a temperature of 80 °C was used.
(3)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS AREA
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
(c) The concentration of solution Q is 26.8 g dm–3.
Calculate the mass of solid Q present in 25 cm3 of solution Q.
mass of solid (g)
concentration (g dm–3) =
volume of solution (dm3 )
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS AREA
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
mass of solid Q =........................... g
3
Turn over
Combined Science Question Paper and Marking Scheme
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
Friday 13 June 2025
Morning (Time: 1 hour 10 minutes) Paper
reference 1SC0/2CH
Combined Science
PAPER 5
Higher Tier
You must have: Total Marks
Calculator, ruler, Periodic Table (enclosed)
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
•• Calculators may be used.
Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
•• The total mark for this paper is 60.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Instructure
questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
Advice
• Try
Read each question carefully before you start to answer it.
•• Checkto answer every question.
your answers if you have time at the end.
Turn over
P75517RRA
©2025 Pearson Education Ltd.
,Y:1/1/1/1/1/1
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 When solutions P and Q are mixed together, a purple mixture forms.
This mixture slowly becomes colourless.
(a) A student pours 25 cm3 of solution P into a conical flask and then adds
25 cm3 of solution Q.
The student uses a beaker to measure out these volumes.
Name a piece of apparatus that could be used to measure these volumes
more accurately.
(1)
............................................................................................................................... ............................................................................................................................... ......................
(b) The student investigates this reaction using the apparatus shown in Figure 1.
The student measures the time taken for the cross to become visible.
The experiment is repeated at different temperatures.
DO NOT WRITE IN THIS AREA
eye
reaction mixture
paper with black cross
Figure 1
Figure 2 shows the results.
temperature in °C time in s
DO NOT WRITE IN THIS AREA
20 45
40 19
60 10
Figure 2
2
, (i) The concentrations of the solutions are kept constant in each experiment.
State one other variable that should be kept constant.
DO NOT WRITE IN THIS AREA
(1)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
(ii) State, and explain in terms of particles, how the time taken for the cross to
become visible would change if a temperature of 80 °C was used.
(3)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS AREA
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
(c) The concentration of solution Q is 26.8 g dm–3.
Calculate the mass of solid Q present in 25 cm3 of solution Q.
mass of solid (g)
concentration (g dm–3) =
volume of solution (dm3 )
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS AREA
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
mass of solid Q =........................... g
3
Turn over
