Pleasevwritevclearly invblock capitals. N N
Centrevnumber Candidatevnumber
Surname v
Forename(s) v
Candidatevsignature
GCSE
CHEMISTRY H
HigherTier v Paper 2 v
Friday13June2025 v v v Morning Timeallowed:1hour45minutes v v v v
Materials ForNExaminer’sNUse
For thisvpapervyouvmust have:
N N
avruler Question Mark
avscientific calculator N
1
thevperiodicvtablev(enclosed).
2
Instructions 3
Usevblack inkvor blackvball-point pen.
N N N 4
Pencil shouldvonly bevusedvfor drawing.
N N N
5
Fill invthevboxesvat thevtopvofvthisvpage.
N N
Answervallvquestionsvinvthevspacesvprovided.v Dovnot writevoutsidevt N
6
hevboxvaroundveachvpagevor onvblankvpages. N 7
If youvneedvextravspacevforvyourvanswer(s),vusevthevlinedvpagesvat thevendvofvt
N N
8
hisvbook.v Writevthevquestionvnumbervagainst your answer(s). N N
9
Dovall roughvworkvinvthisvbook.v Crossvthroughvany work youvdovnot want
N N N N
tovbevmarked. TOTAL
Information
Thevmaximumvmarkvforvthisvpapervisv100.
Thevmarksvfor questionsvarevshownvinvbrackets.
N
Youvarevexpectedvtovusevavcalculatorvwherevappropriate.
Invall calculations,vshowvclearly howvyouvworkvout yourvanswer.
N N N
YouvarevremindedvofvthevneedvforvgoodvEnglishvandvclear presentationvi N
nvyourvanswers.
IB/G/Jun25/G4007/E10 8462/2H
, 2
Dovnotvwrit
v eNv outsid
ev t box
0 1 v Avstudent investigatedvthevmassvofvdissolvedvsolidsvinvseavwater.v
N
Thisvisvthevmethodvused.
1. Weighvanvempty evaporatingv basin.
N
2. Measurev10.0vcm3vofvseavwatervsamplevA intovthevevaporatingvbasinv
N
usingvavburette.
3. Heat thevevaporatingvbasinvuntil all thevwatervseemsvtovhavevevaporated.
N N N
4. Weighvthevevaporatingvbasinvandvcontents.
5. Calculatevthevmassvofvdissolvedvsolidsvinvthevsample.
6. Repeat stepsv1 tov5vwithvseavwatervsamplesvB,vCvandvD.
N N
0 1 . 1 Why didvthevstudent usevavburettevrather thanvavmeasuringvcylindervtovmeasure
N N N
10.0vcm3vofveachvsample?
[1vmark]
0 1 . 2 What wasvthevdependent variablevinvthisvinvestigation?
N N
[1vmark]
0 1 . 3 Describevhowvthevstudent couldvmakevsurevallvofvthevwatervhadvevaporatedvinvstepv3.
N
[2vmarks]
0 1 . 4 Howvdidvthevstudent calculatevthevmassvofvdissolvedvsolidsvinveachvseavwatervsample?
N
[1vmark]
IB/G/Jun25/8462/2H
, 3
Dovnotvwrit
v eNv outsid
Tablev1vshowsvthevresults. ev t box
Tablev1
Seavwatervsample A B C D
Massvofvdissolvedvsolidsvinvgrams 0.35 0.37 0.33 0.34
0 1 . 5
Calculatevthevmeanvconcentrationvofvdissolvedvsolidsvinv10.0vcm3vsamplesv
ofvsevavwatervA,vB,vCvandvD.
UsevTablev1vandvthevequation:
meanvmassvofvdissolvedvsolidsv(g)
meanvconcentrationvofvdissolvedvsolidsv(g/dm3)v=v
volumevofvsamplev(dm3)
3
Givevyourvanswer invg/dm .
N
[5 marks]
N
Meanvconcentrationv= ________________ g/dm3
0 1 .v 6
Suggest why seavwatervsamplesvA,vB,vCvandvDvcontainvdifferent ma
N N N
ssesvofvdissolvedvsolids. [1vmark]
11
IB/G/Jun25/8462/2H
, 4
Dovnotvwrit
Turnvoverv► v eNv outsid
ev t
IB/G/Jun25/8462/2H
Centrevnumber Candidatevnumber
Surname v
Forename(s) v
Candidatevsignature
GCSE
CHEMISTRY H
HigherTier v Paper 2 v
Friday13June2025 v v v Morning Timeallowed:1hour45minutes v v v v
Materials ForNExaminer’sNUse
For thisvpapervyouvmust have:
N N
avruler Question Mark
avscientific calculator N
1
thevperiodicvtablev(enclosed).
2
Instructions 3
Usevblack inkvor blackvball-point pen.
N N N 4
Pencil shouldvonly bevusedvfor drawing.
N N N
5
Fill invthevboxesvat thevtopvofvthisvpage.
N N
Answervallvquestionsvinvthevspacesvprovided.v Dovnot writevoutsidevt N
6
hevboxvaroundveachvpagevor onvblankvpages. N 7
If youvneedvextravspacevforvyourvanswer(s),vusevthevlinedvpagesvat thevendvofvt
N N
8
hisvbook.v Writevthevquestionvnumbervagainst your answer(s). N N
9
Dovall roughvworkvinvthisvbook.v Crossvthroughvany work youvdovnot want
N N N N
tovbevmarked. TOTAL
Information
Thevmaximumvmarkvforvthisvpapervisv100.
Thevmarksvfor questionsvarevshownvinvbrackets.
N
Youvarevexpectedvtovusevavcalculatorvwherevappropriate.
Invall calculations,vshowvclearly howvyouvworkvout yourvanswer.
N N N
YouvarevremindedvofvthevneedvforvgoodvEnglishvandvclear presentationvi N
nvyourvanswers.
IB/G/Jun25/G4007/E10 8462/2H
, 2
Dovnotvwrit
v eNv outsid
ev t box
0 1 v Avstudent investigatedvthevmassvofvdissolvedvsolidsvinvseavwater.v
N
Thisvisvthevmethodvused.
1. Weighvanvempty evaporatingv basin.
N
2. Measurev10.0vcm3vofvseavwatervsamplevA intovthevevaporatingvbasinv
N
usingvavburette.
3. Heat thevevaporatingvbasinvuntil all thevwatervseemsvtovhavevevaporated.
N N N
4. Weighvthevevaporatingvbasinvandvcontents.
5. Calculatevthevmassvofvdissolvedvsolidsvinvthevsample.
6. Repeat stepsv1 tov5vwithvseavwatervsamplesvB,vCvandvD.
N N
0 1 . 1 Why didvthevstudent usevavburettevrather thanvavmeasuringvcylindervtovmeasure
N N N
10.0vcm3vofveachvsample?
[1vmark]
0 1 . 2 What wasvthevdependent variablevinvthisvinvestigation?
N N
[1vmark]
0 1 . 3 Describevhowvthevstudent couldvmakevsurevallvofvthevwatervhadvevaporatedvinvstepv3.
N
[2vmarks]
0 1 . 4 Howvdidvthevstudent calculatevthevmassvofvdissolvedvsolidsvinveachvseavwatervsample?
N
[1vmark]
IB/G/Jun25/8462/2H
, 3
Dovnotvwrit
v eNv outsid
Tablev1vshowsvthevresults. ev t box
Tablev1
Seavwatervsample A B C D
Massvofvdissolvedvsolidsvinvgrams 0.35 0.37 0.33 0.34
0 1 . 5
Calculatevthevmeanvconcentrationvofvdissolvedvsolidsvinv10.0vcm3vsamplesv
ofvsevavwatervA,vB,vCvandvD.
UsevTablev1vandvthevequation:
meanvmassvofvdissolvedvsolidsv(g)
meanvconcentrationvofvdissolvedvsolidsv(g/dm3)v=v
volumevofvsamplev(dm3)
3
Givevyourvanswer invg/dm .
N
[5 marks]
N
Meanvconcentrationv= ________________ g/dm3
0 1 .v 6
Suggest why seavwatervsamplesvA,vB,vCvandvDvcontainvdifferent ma
N N N
ssesvofvdissolvedvsolids. [1vmark]
11
IB/G/Jun25/8462/2H
, 4
Dovnotvwrit
Turnvoverv► v eNv outsid
ev t
IB/G/Jun25/8462/2H
