e
nc
ie
Sc
Please check the examination details below before entering your candidate information
ed
Candidate surname Other names
in
mb
Co
Centre Number Candidate Number
SE
GC
l
22 ce
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
20 dex
E
Paper
Time 1 hour 10 minutes
reference 1SC0/2CH
Combined Science
PAPER 5
Higher Tier
You must have: Total Marks
Calculator, ruler
Instructions
•• Fill
Use black ink or ball-point pen.
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.
•• Any diagramsmaymaybeNOT
Calculators used.
be accurately drawn, unless otherwise indicated.
• end of your solution. working out with your answer clearly identified at the
You must show all your
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.
• There is a periodic table on the back cover of the paper.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end. Turn over
*P69474A0120*
P69474A
©2022 Pearson Education Ltd.
Q:1/1/
, e
nc
ie
Sc
ed
Answer ALL questions. Write your answers in the spaces provided.
in
mb
Co
Some questions must be answered with a cross in a box . If you change your mind about an
SE
answer, put a line through the box and then mark your new answer with a cross .
GC
l
1 A student used the apparatus in Figure 1 to investigate the rate of the reaction
22 ce
20 dex
between a metal and dilute hydrochloric acid.
E
Pieces of the metal were placed in dilute hydrochloric acid in the flask, and the total
volume of gas produced was measured every minute.
hydrogen
250 cm3 measuring cylinder
dilute
hydrochloric acid trough
metal pieces water
Figure 1
(a) Figure 2 shows a graph of the student’s results.
volume of 70
hydrogen
in cm3 60
50
40
30
20
10
0
0 2 4 6 8 10
time in minutes
Figure 2
2
*P69474A0220*
, e
nc
ie
Sc
ed
(i) Name a piece of apparatus that would be better to measure the volume of gas
in
mb
produced, instead of the 250 cm3 measuring cylinder.
Co
Give a reason for your answer.
SE
GC
(2)
l
22 ce
name of apparatus
20 dex
E
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
reason
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
(ii) Calculate the mean rate of production of hydrogen over the first 90 seconds,
in cm3 per second.
(3)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
rate = .............................................................. cm3 per second
(iii) The student measured the volume of gas for 10 minutes.
State why the measurements could have been stopped at 9 minutes.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
(b) The experiment was repeated, but with acid of a higher concentration.
The rate of reaction was faster.
(i) Explain why the rate of reaction increases when the concentration of acid is
increased.
(2)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
*P69474A0320*
3
Turn over
nc
ie
Sc
Please check the examination details below before entering your candidate information
ed
Candidate surname Other names
in
mb
Co
Centre Number Candidate Number
SE
GC
l
22 ce
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
20 dex
E
Paper
Time 1 hour 10 minutes
reference 1SC0/2CH
Combined Science
PAPER 5
Higher Tier
You must have: Total Marks
Calculator, ruler
Instructions
•• Fill
Use black ink or ball-point pen.
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.
•• Any diagramsmaymaybeNOT
Calculators used.
be accurately drawn, unless otherwise indicated.
• end of your solution. working out with your answer clearly identified at the
You must show all your
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.
• There is a periodic table on the back cover of the paper.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end. Turn over
*P69474A0120*
P69474A
©2022 Pearson Education Ltd.
Q:1/1/
, e
nc
ie
Sc
ed
Answer ALL questions. Write your answers in the spaces provided.
in
mb
Co
Some questions must be answered with a cross in a box . If you change your mind about an
SE
answer, put a line through the box and then mark your new answer with a cross .
GC
l
1 A student used the apparatus in Figure 1 to investigate the rate of the reaction
22 ce
20 dex
between a metal and dilute hydrochloric acid.
E
Pieces of the metal were placed in dilute hydrochloric acid in the flask, and the total
volume of gas produced was measured every minute.
hydrogen
250 cm3 measuring cylinder
dilute
hydrochloric acid trough
metal pieces water
Figure 1
(a) Figure 2 shows a graph of the student’s results.
volume of 70
hydrogen
in cm3 60
50
40
30
20
10
0
0 2 4 6 8 10
time in minutes
Figure 2
2
*P69474A0220*
, e
nc
ie
Sc
ed
(i) Name a piece of apparatus that would be better to measure the volume of gas
in
mb
produced, instead of the 250 cm3 measuring cylinder.
Co
Give a reason for your answer.
SE
GC
(2)
l
22 ce
name of apparatus
20 dex
E
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
reason
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
(ii) Calculate the mean rate of production of hydrogen over the first 90 seconds,
in cm3 per second.
(3)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
rate = .............................................................. cm3 per second
(iii) The student measured the volume of gas for 10 minutes.
State why the measurements could have been stopped at 9 minutes.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
(b) The experiment was repeated, but with acid of a higher concentration.
The rate of reaction was faster.
(i) Explain why the rate of reaction increases when the concentration of acid is
increased.
(2)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... ................ . . . . . . . . . . . . . . . . . . . .
*P69474A0320*
3
Turn over
