Edexcel Chemistry 2CF 2025 Predicted Question Paper
Mark Scheme
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
Paper 5: Chemistry 2 (1SC0/2CF) –
Foundation Tier
, Edexcel Chemistry 2CF 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 2CF 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
01.a B. Low density 1
Question Answers Extra information Mark
01.b Potassium’s outer electron Potassium’s Reactivity: 2
is further from the nucleus, • The outer electron is in a
experiences weaker higher energy level,
attraction, and is lost more farther from the nucleus.
easily • Weaker nuclear attraction
allows the electron to be
lost more easily, making
potassium highly
reactive.
Question Answers Extra information Mark
Reaction Equation: Sodium
01.c 2Na(s)+2H2O(l)→2NaOH( reacts with water to produce 2
aq)+H2(g)2Na (s) + 2H₂O sodium hydroxide (NaOH)
(l) → 2NaOH (aq) + H₂ and hydrogen gas (H2), a
(g)2Na(s)+2H2 highly exothermic reaction.
O(l)→2NaOH(aq)+H2(g)
3
, Edexcel Chemistry 2CF 2025 Predicted Question Paper
Question Answers Extra information Mark
Hydrogen Test: The
01.d Gas: Hydrogen. Test: Use a 2
“squeaky pop” sound
lit splint; a squeaky pop
indicates hydrogen
confirms hydrogen
combustion when it reacts
explosively with oxygen.
Total Question 1 8
Justification for the Question 01 (Based on Trends from 2018–2023)
4
Mark Scheme
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
Paper 5: Chemistry 2 (1SC0/2CF) –
Foundation Tier
, Edexcel Chemistry 2CF 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 2CF 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
01.a B. Low density 1
Question Answers Extra information Mark
01.b Potassium’s outer electron Potassium’s Reactivity: 2
is further from the nucleus, • The outer electron is in a
experiences weaker higher energy level,
attraction, and is lost more farther from the nucleus.
easily • Weaker nuclear attraction
allows the electron to be
lost more easily, making
potassium highly
reactive.
Question Answers Extra information Mark
Reaction Equation: Sodium
01.c 2Na(s)+2H2O(l)→2NaOH( reacts with water to produce 2
aq)+H2(g)2Na (s) + 2H₂O sodium hydroxide (NaOH)
(l) → 2NaOH (aq) + H₂ and hydrogen gas (H2), a
(g)2Na(s)+2H2 highly exothermic reaction.
O(l)→2NaOH(aq)+H2(g)
3
, Edexcel Chemistry 2CF 2025 Predicted Question Paper
Question Answers Extra information Mark
Hydrogen Test: The
01.d Gas: Hydrogen. Test: Use a 2
“squeaky pop” sound
lit splint; a squeaky pop
indicates hydrogen
confirms hydrogen
combustion when it reacts
explosively with oxygen.
Total Question 1 8
Justification for the Question 01 (Based on Trends from 2018–2023)
4
