Mark Scheme (Results)
Summer 2026
Pearson Edexcel GCSE in Chemistry
1CH0/ 2H
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s
largest awarding body. We provide a wide range of qualifications
including academic, vocational, occupational and specific
programmes for employers. For further information visit our
qualifications websites at www.edexcel.com or www.btec.co.uk.
Alternatively, you can get in touch with us using the details on our
contact us page at www.edexcel.com/contactus
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help
everyone progress in their lives through education. We believe in every kind of
learning, for all kinds of people, wherever they are in the world. We’ve been
involved in education for over 150 years, and by working across 70 countries, in
100 languages, we have built an international reputation for our commitment to
high standards and raising achievement through innovation in education. Find
out more about how we can help you and your students at:
www.pearson.com/uk
Summer 2026
Question Paper Log Number P79132A
Publication Code 1CH0_2H_2606_MS
All the material in this publication is copyright
© Pearson
,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.
Subject specific marking guidance
Symbols, terms used in the mark scheme
• Round brackets ( ): words inside round brackets are to aid
understanding of the marking point but are not required to award
the point
• Curly brackets { }: indicate the beginning and end of a list of
alternatives (separated by obliques) where necessary to avoid
confusion
• Oblique /: words or phrases separated by an oblique are
alternatives to each other and either answer should receive full
credit.
• ecf: indicates error carried forward which means that a wrong
answer given in an early part of a question is used correctly to a later
part of a question.
, You will not see owtte (or words to that effect). Alternative correct
wording should be credited in every answer unless the ms has specified
specific.
The Additional Guidance column is used for extra guidance to clarify any
points in the mark scheme. It may be used to indicate:
• what will not be accepted for that marking point in which case the
phrase ‘do not accept’ will be alongside the relevant marking point
• it might have examples of possible acceptable answers which will
be adjacent to that marking point
Summer 2026
Pearson Edexcel GCSE in Chemistry
1CH0/ 2H
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s
largest awarding body. We provide a wide range of qualifications
including academic, vocational, occupational and specific
programmes for employers. For further information visit our
qualifications websites at www.edexcel.com or www.btec.co.uk.
Alternatively, you can get in touch with us using the details on our
contact us page at www.edexcel.com/contactus
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help
everyone progress in their lives through education. We believe in every kind of
learning, for all kinds of people, wherever they are in the world. We’ve been
involved in education for over 150 years, and by working across 70 countries, in
100 languages, we have built an international reputation for our commitment to
high standards and raising achievement through innovation in education. Find
out more about how we can help you and your students at:
www.pearson.com/uk
Summer 2026
Question Paper Log Number P79132A
Publication Code 1CH0_2H_2606_MS
All the material in this publication is copyright
© Pearson
,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.
Subject specific marking guidance
Symbols, terms used in the mark scheme
• Round brackets ( ): words inside round brackets are to aid
understanding of the marking point but are not required to award
the point
• Curly brackets { }: indicate the beginning and end of a list of
alternatives (separated by obliques) where necessary to avoid
confusion
• Oblique /: words or phrases separated by an oblique are
alternatives to each other and either answer should receive full
credit.
• ecf: indicates error carried forward which means that a wrong
answer given in an early part of a question is used correctly to a later
part of a question.
, You will not see owtte (or words to that effect). Alternative correct
wording should be credited in every answer unless the ms has specified
specific.
The Additional Guidance column is used for extra guidance to clarify any
points in the mark scheme. It may be used to indicate:
• what will not be accepted for that marking point in which case the
phrase ‘do not accept’ will be alongside the relevant marking point
• it might have examples of possible acceptable answers which will
be adjacent to that marking point
