Mark Scheme (Results)
November 2021
Pearson Edexcel GCE
In Chemistry (9CH0)
Paper 3: General and Practical Principles in
Chemistry
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications come from Pearson, the world’s leading learning
company. 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 for our BTEC
qualifications.
Alternatively, you can get in touch with us using the details on our contact us page at
www.edexcel.com/contactus.
If you have any subject specific questions about this specification that require the help
of a subject specialist, you can speak directly to the subject team at Pearson.
Their contact details can be found on this link: www.edexcel.com/teachingservices.
You can also use our online Ask the Expert service at www.edexcel.com/ask. You will
need an Edexcel username and password to access this service.
Pearson: helping people progress, everywhere
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
November 2021
Question Paper Log Number 67806
Publications Code 9CH0_03_2111_MS
All the material in this publication is copyright
© Pearson Education Ltd 2021
,General wMarking wGuidance
All wcandidates wmust wreceive wthe wsame wtreatment. wExaminers wmust
wmark wthe wfirst wcandidate win wexactly wthe wsame wway was wthey wmark
wthe wlast.
Mark w schemes w should w be w applied w positively. w Candidates w must
w be w rewarded wfor w what w they w have w shown w they w can w do w rather
w than w penalised w for w omissions.
Examiners w should w mark w according w to w the w mark w scheme w not
w according w to wtheir wperception wof wwhere wthe wgrade wboundaries
wmay wlie.
There wis wno wceiling won wachievement. wAll wmarks won wthe wmark
wscheme wshould wbe wused wappropriately.
All w the wmarks won w the wmark w scheme w are w designed wto w be
w awarded. w Examiners wshould w always w award w full w marks w if
w deserved, w i.e. w if w the w answer w matches w the wmark w scheme.
w Examiners w should w also w be w prepared w to w award w zero w marks w if
wthe wcandidate’s wresponse wis wnot wworthy wof wcredit waccording wto
wthe wmark wscheme.
Where wsome wjudgement wis wrequired, wmark wschemes wwill
wprovide wthe wprinciples w by w which w marks w will w be w awarded
w and w exemplification w may w be wlimited.
When w examiners w are w in w doubt w regarding w the w application w of w the
w mark w scheme wto wa wcandidate’s wresponse, wthe wteam wleader wmust
wbe wconsulted.
Crossed wout wwork wshould wbe wmarked wUNLESS wthe wcandidate whas
wreplaced wit w with wan walternative wresponse.
Mark wschemes wwill windicate wwithin wthe wtable wwhere, wand wwhich
wstrands wof wQWC, ware wbeing wassessed. wThe wstrands ware was
wfollows:
i) ensure w that w text w is w legible w and w that w spelling, w punctuation w and
w grammar w are waccurate wso wthat wmeaning wis wclear
ii) select wand wuse wa wform wand wstyle wof wwriting wappropriate wto
wpurpose wand wto wcomplex wsubject wmatter
iii) organise winformation wclearly wand wcoherently, wusing wspecialist
wvocabulary wwhen wappropriate.
, Using wthe wmark wscheme
Examiners wshould wlook wfor wqualities wto wreward wrather wthan wfaults wto wpenalise. wThis wdoes wNOT wmean wgiving wcredit wfor
wincorrect wor winadequate w answers, w but w it w does w mean w allowing w candidates w to w be w rewarded w for w answers w showing
w correct w application w of w principles w and wknowledge. w Examiners w should w therefore w read w carefully w and w consider w every
w response: w even w if w it w is w not w what w is w expected w it w may w be w worthy wof wcredit.
The w mark wscheme wgives wexaminers:
an widea wof wthe wtypes wof wresponse wexpected
how w individual w marks w are w to w be w awarded
the wtotal wmark wfor weach wquestion
examples w of w responses w that w should w NOT w receive w credit.
/ w means w that w the w responses w are w alternatives w and w either w answer w should w receive w full w credit. w ( w ) w means w that w a
w phrase/word w is w not w essential w for wthe waward wof wthe wmark, wbut whelps wthe wexaminer wto wget wthe wsense wof wthe wexpected
wanswer.
Phrases/words win wbold windicate wthat wthe wmeaning wof wthe wphrase wor wthe wactual wword wis wessential wto wthe wanswer.
wecf/TE/cq w(error wcarried wforward) wmeans wthat wa wwrong wanswer wgiven win wan wearlier wpart wof wa wquestion wis wused wcorrectly
win wanswer wto wa wlater wpart wof wthe wsame wquestion.
Candidates w must w make w their w meaning w clear w to w the w examiner w to w gain w the w mark. w Make w sure w that w the w answer w makes
w sense. w Do w not w give wcredit wfor wcorrect wwords/phrases wwhich ware wput wtogether win wa wmeaningless wmanner. wAnswers
wmust wbe win wthe wcorrect wcontext.
Quality wof wWritten wCommunication
Questions w which w involve w the w writing w of w continuous w prose w will w expect w candidates w to:
write w legibly, w with w accurate w use w of w spelling, w grammar w and w punctuation w in w order w to w make w the w meaning w clear
select w and w use w a w form w and w style w of w writing w appropriate w to w purpose w and w to w complex w subject w matter
organise winformation wclearly wand wcoherently, wusing wspecialist wvocabulary wwhen wappropriate.
Full w marks w will w be w awarded w if w the w candidate w has w demonstrated w the w above w abilities. w Questions w where w QWC w is w likely
w to w be w particularly wimportant ware windicated w(QWC) win wthe wmark wscheme, wbut wthis wdoes wnot wpreclude wothers.
November 2021
Pearson Edexcel GCE
In Chemistry (9CH0)
Paper 3: General and Practical Principles in
Chemistry
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications come from Pearson, the world’s leading learning
company. 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 for our BTEC
qualifications.
Alternatively, you can get in touch with us using the details on our contact us page at
www.edexcel.com/contactus.
If you have any subject specific questions about this specification that require the help
of a subject specialist, you can speak directly to the subject team at Pearson.
Their contact details can be found on this link: www.edexcel.com/teachingservices.
You can also use our online Ask the Expert service at www.edexcel.com/ask. You will
need an Edexcel username and password to access this service.
Pearson: helping people progress, everywhere
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
November 2021
Question Paper Log Number 67806
Publications Code 9CH0_03_2111_MS
All the material in this publication is copyright
© Pearson Education Ltd 2021
,General wMarking wGuidance
All wcandidates wmust wreceive wthe wsame wtreatment. wExaminers wmust
wmark wthe wfirst wcandidate win wexactly wthe wsame wway was wthey wmark
wthe wlast.
Mark w schemes w should w be w applied w positively. w Candidates w must
w be w rewarded wfor w what w they w have w shown w they w can w do w rather
w than w penalised w for w omissions.
Examiners w should w mark w according w to w the w mark w scheme w not
w according w to wtheir wperception wof wwhere wthe wgrade wboundaries
wmay wlie.
There wis wno wceiling won wachievement. wAll wmarks won wthe wmark
wscheme wshould wbe wused wappropriately.
All w the wmarks won w the wmark w scheme w are w designed wto w be
w awarded. w Examiners wshould w always w award w full w marks w if
w deserved, w i.e. w if w the w answer w matches w the wmark w scheme.
w Examiners w should w also w be w prepared w to w award w zero w marks w if
wthe wcandidate’s wresponse wis wnot wworthy wof wcredit waccording wto
wthe wmark wscheme.
Where wsome wjudgement wis wrequired, wmark wschemes wwill
wprovide wthe wprinciples w by w which w marks w will w be w awarded
w and w exemplification w may w be wlimited.
When w examiners w are w in w doubt w regarding w the w application w of w the
w mark w scheme wto wa wcandidate’s wresponse, wthe wteam wleader wmust
wbe wconsulted.
Crossed wout wwork wshould wbe wmarked wUNLESS wthe wcandidate whas
wreplaced wit w with wan walternative wresponse.
Mark wschemes wwill windicate wwithin wthe wtable wwhere, wand wwhich
wstrands wof wQWC, ware wbeing wassessed. wThe wstrands ware was
wfollows:
i) ensure w that w text w is w legible w and w that w spelling, w punctuation w and
w grammar w are waccurate wso wthat wmeaning wis wclear
ii) select wand wuse wa wform wand wstyle wof wwriting wappropriate wto
wpurpose wand wto wcomplex wsubject wmatter
iii) organise winformation wclearly wand wcoherently, wusing wspecialist
wvocabulary wwhen wappropriate.
, Using wthe wmark wscheme
Examiners wshould wlook wfor wqualities wto wreward wrather wthan wfaults wto wpenalise. wThis wdoes wNOT wmean wgiving wcredit wfor
wincorrect wor winadequate w answers, w but w it w does w mean w allowing w candidates w to w be w rewarded w for w answers w showing
w correct w application w of w principles w and wknowledge. w Examiners w should w therefore w read w carefully w and w consider w every
w response: w even w if w it w is w not w what w is w expected w it w may w be w worthy wof wcredit.
The w mark wscheme wgives wexaminers:
an widea wof wthe wtypes wof wresponse wexpected
how w individual w marks w are w to w be w awarded
the wtotal wmark wfor weach wquestion
examples w of w responses w that w should w NOT w receive w credit.
/ w means w that w the w responses w are w alternatives w and w either w answer w should w receive w full w credit. w ( w ) w means w that w a
w phrase/word w is w not w essential w for wthe waward wof wthe wmark, wbut whelps wthe wexaminer wto wget wthe wsense wof wthe wexpected
wanswer.
Phrases/words win wbold windicate wthat wthe wmeaning wof wthe wphrase wor wthe wactual wword wis wessential wto wthe wanswer.
wecf/TE/cq w(error wcarried wforward) wmeans wthat wa wwrong wanswer wgiven win wan wearlier wpart wof wa wquestion wis wused wcorrectly
win wanswer wto wa wlater wpart wof wthe wsame wquestion.
Candidates w must w make w their w meaning w clear w to w the w examiner w to w gain w the w mark. w Make w sure w that w the w answer w makes
w sense. w Do w not w give wcredit wfor wcorrect wwords/phrases wwhich ware wput wtogether win wa wmeaningless wmanner. wAnswers
wmust wbe win wthe wcorrect wcontext.
Quality wof wWritten wCommunication
Questions w which w involve w the w writing w of w continuous w prose w will w expect w candidates w to:
write w legibly, w with w accurate w use w of w spelling, w grammar w and w punctuation w in w order w to w make w the w meaning w clear
select w and w use w a w form w and w style w of w writing w appropriate w to w purpose w and w to w complex w subject w matter
organise winformation wclearly wand wcoherently, wusing wspecialist wvocabulary wwhen wappropriate.
Full w marks w will w be w awarded w if w the w candidate w has w demonstrated w the w above w abilities. w Questions w where w QWC w is w likely
w to w be w particularly wimportant ware windicated w(QWC) win wthe wmark wscheme, wbut wthis wdoes wnot wpreclude wothers.
