Mark Scheme
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
In Chemistry (1CH0/2F) Paper 2F
, Edexcel Chemistry 2F 2025 Predicted Question
Paper
General Marking Guidance
• All candidates must receive the same treatment. Examiners must mark the first
candidate in exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates must be rewarded for
what they have shown they can do rather than penalised for omissions.
• Examiners should mark according to the mark scheme not according to their
perception of where the grade boundaries may lie.
• There is no ceiling on achievement. All marks on the mark scheme should be used
appropriately.
• All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide the principles by
which marks will be awarded and exemplification may be limited.
• When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
• Crossed out work should be marked UNLESS the candidate has replaced it
with an alternative response.
, Edexcel Chemistry 2F 2025 Predicted Question
Paper
Find the comprehensive elaborations for the question set provided
beneath the mark scheme for Question 01.
Question 1
Question Answers Extra information Mark
(a) Correct order of steps:
Reason for correct step 4
01.a
1. R – Measure 50 cm³ of order: Following the steps
water using a measuring ensures accurate measurement
cylinder. and minimizes errors during the
2. P – Pour the water into experiment.
the polystyrene cup. Use of lid: Prevents heat from
escaping into the surroundings,
3. S – Measure the initial making temperature
temperature of the water. measurements more accurate.
4. Q – Add the solid to the Polystyrene cup's insulation:
water and stir. Its low thermal conductivity
reduces heat exchange
5. T – Measure the final between the system and
temperature of the surroundings.
solution after stirring.
(2 marks for all steps in
correct order; 1 mark for
3–4 correct steps.)
(b) Suggestion to reduce heat
loss: Use a lid on the
polystyrene cup. (1 mark)
(c) Reason for using a
polystyrene cup: Polystyrene is
a good insulator and reduces
heat loss to the surroundings.
(1 mark)
Question Answers Extra information Mark
3
, Edexcel Chemistry 2F 2025 Predicted Question
Paper
01.b (i) Temperature change = Endothermic reactions: The 5
Initial temperature – Final energy absorbed breaks
temperature = 22∘ 𝐶 − bonds in reactants, causing
16∘ 𝐶 = 6∘ 𝐶 the surroundings to lose heat.
. (1 mark) Exothermic reactions: Heat is
(ii) Reaction type: released as new bonds form
Endothermic. Explanation: in the products, increasing
The temperature decreases the surroundings'
because energy is temperature.
absorbed from the
surroundings during the
reaction. (2 marks)
(c) Reaction type:
Exothermic. Explanation:
Heat energy is released
into the surroundings,
causing an increase in
temperature. (2 marks)
Question Answers Extra information Mark
(a) Explanation for cold Cold packs: Often use
01.c pack becoming cold: The ammonium nitrate and 4
reaction inside the pack water, which react
absorbs heat from its endothermically,
surroundings, making it making them
an endothermic process. convenient for sports
(2 marks) injuries or first aid.
(b) Advantages of cold
packs:
● Portable and easy to
use anywhere. (1
mark)
● No risk of frostbite
compared to direct ice
application. (1 mark)
Total Question 1 13
4
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
In Chemistry (1CH0/2F) Paper 2F
, Edexcel Chemistry 2F 2025 Predicted Question
Paper
General Marking Guidance
• All candidates must receive the same treatment. Examiners must mark the first
candidate in exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates must be rewarded for
what they have shown they can do rather than penalised for omissions.
• Examiners should mark according to the mark scheme not according to their
perception of where the grade boundaries may lie.
• There is no ceiling on achievement. All marks on the mark scheme should be used
appropriately.
• All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide the principles by
which marks will be awarded and exemplification may be limited.
• When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
• Crossed out work should be marked UNLESS the candidate has replaced it
with an alternative response.
, Edexcel Chemistry 2F 2025 Predicted Question
Paper
Find the comprehensive elaborations for the question set provided
beneath the mark scheme for Question 01.
Question 1
Question Answers Extra information Mark
(a) Correct order of steps:
Reason for correct step 4
01.a
1. R – Measure 50 cm³ of order: Following the steps
water using a measuring ensures accurate measurement
cylinder. and minimizes errors during the
2. P – Pour the water into experiment.
the polystyrene cup. Use of lid: Prevents heat from
escaping into the surroundings,
3. S – Measure the initial making temperature
temperature of the water. measurements more accurate.
4. Q – Add the solid to the Polystyrene cup's insulation:
water and stir. Its low thermal conductivity
reduces heat exchange
5. T – Measure the final between the system and
temperature of the surroundings.
solution after stirring.
(2 marks for all steps in
correct order; 1 mark for
3–4 correct steps.)
(b) Suggestion to reduce heat
loss: Use a lid on the
polystyrene cup. (1 mark)
(c) Reason for using a
polystyrene cup: Polystyrene is
a good insulator and reduces
heat loss to the surroundings.
(1 mark)
Question Answers Extra information Mark
3
, Edexcel Chemistry 2F 2025 Predicted Question
Paper
01.b (i) Temperature change = Endothermic reactions: The 5
Initial temperature – Final energy absorbed breaks
temperature = 22∘ 𝐶 − bonds in reactants, causing
16∘ 𝐶 = 6∘ 𝐶 the surroundings to lose heat.
. (1 mark) Exothermic reactions: Heat is
(ii) Reaction type: released as new bonds form
Endothermic. Explanation: in the products, increasing
The temperature decreases the surroundings'
because energy is temperature.
absorbed from the
surroundings during the
reaction. (2 marks)
(c) Reaction type:
Exothermic. Explanation:
Heat energy is released
into the surroundings,
causing an increase in
temperature. (2 marks)
Question Answers Extra information Mark
(a) Explanation for cold Cold packs: Often use
01.c pack becoming cold: The ammonium nitrate and 4
reaction inside the pack water, which react
absorbs heat from its endothermically,
surroundings, making it making them
an endothermic process. convenient for sports
(2 marks) injuries or first aid.
(b) Advantages of cold
packs:
● Portable and easy to
use anywhere. (1
mark)
● No risk of frostbite
compared to direct ice
application. (1 mark)
Total Question 1 13
4
