AQA A LEVEL
h h
CHEMISTRY
h
PAPER 2
h h
ORGANICAND
h h
PHYSICAL
h
CHEMISTRY
h
2020 QP
h h
IB/M/Jun20/E11 7405/2
, Please hwrite hclearly hin hblock
capitals.
Centre hnumber Candidate hnumber
Surname h
Forename(s) h
Candidate hsignature
I hdeclare hthis his hmy hown
work.
A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry
h h h h h
Monday 8 June 2020
h h h Afternoon Time allowed: 2 hours
h h h
Materials
For hExaminer’s hUse
For hthis hpaper hyou hmust hhave:
the hPeriodic hTable/Data hBooklet, hprovided has han hinsert h(enclosed) Question Mark
a hruler hwith hmillimetre hmeasurements
1
a hscientific hcalculator, hwhich hyou hare hexpected hto huse hwhere happropriate.
2
Instructions 3
Use hblack hink hor hblack hball-point hpen. 4
Fill hin hthe hboxes hat hthe htop hof hthis hpage.
5
Answer hall hquestions.
You hmust hanswer hthe hquestions hin hthe hspaces hprovided. hDo hnot hwrite 6
houtside hthe hbox haround heach hpage hor hon hblank hpages. 7
If hyou hneed hextra hspace hfor hyour hanswer(s), huse hthe hlined hpages hat hthe hend 8
hof hthis hbook. h Write hthe hquestion hnumber hagainst hyour hanswer(s).
All hworking hmust hbe hshown. 9
Do hall hrough hwork hin hthis hbook. hCross hthrough hany hwork hyou hdo hnot hwant TOTAL
hto hbe hmarked.
Information
The hmarks hfor hquestions hare hshown hin hbrackets.
The hmaximum hmark hfor hthis hpaper his h105.
IB/M/Jun20/E11 7405/2
, 2
Do hnot
hwrite
Answer hall hquestions hin hthe hspaces box
h outside
hprovided.
0 1 This hquestion his habout hrates hof hreaction.
Phosphinate hions h(H2PO h–) hreact hwith hhydroxide hions hto hproduce hhydrogen hgas has
2
shown.
–h − h 2– h
H hPO h + hOH →HPO h + hH
2 2 3 2
A hstudent hcompleted han hexperiment hto hdetermine hthe hinitial hrate hof hthis hreaction.
The hstudent hused ha hsolution hcontaining hphosphinate hions hand hmeasured hthe hvolume hof
hhydrogen hgas hcollected hevery h20 hseconds hat ha hconstant htemperature.
Figure h1 hshows ha hgraph hof hthe hstudent’s hresults.
Figure h1
0 1
.1 Use hthe hgraph hin hFigure h1 hto hdetermine hthe hinitial hrate hof hreaction hfor hthis hexperiment.
hState hits hunits. hShow hyour hworking hon hthe hgraph.
[3 hmarks]
Rate h Units h
IB/M/Jun20/7405/2
, 3
Do hnot
hwrite
0 1 . 2 box
Another hstudent hreacted hdifferent hinitial hconcentrations hof hphosphinate hions hwith h outside
han hexcess hof hhydroxide hions. h The hstudent hmeasured hthe htime h(t) htaken hto
hcollect
15 hcm3 hof hhydrogen hgas. h Each hexperiment hwas hcarried hout hat hthe hsame
htemperature.
Table h1 hshows hthe hresults.
Table h1
– –3
Initial h[H2PO2 h ] h/ hmol hdm t h/ hs
0.25 64
0.35 32
0.50 16
1.00 4
State hthe hrelationship hbetween hthe hinitial hconcentration hof hphosphinate hand htime h(t).
Deduce hthe horder hof hthe hreaction hwith hrespect hto hphosphinate.
[2 hmarks]
Relationship
Order h
Question h1 hcontinues hon hthe hnext hpage
IB/M/Jun20/7405/2
h h
CHEMISTRY
h
PAPER 2
h h
ORGANICAND
h h
PHYSICAL
h
CHEMISTRY
h
2020 QP
h h
IB/M/Jun20/E11 7405/2
, Please hwrite hclearly hin hblock
capitals.
Centre hnumber Candidate hnumber
Surname h
Forename(s) h
Candidate hsignature
I hdeclare hthis his hmy hown
work.
A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry
h h h h h
Monday 8 June 2020
h h h Afternoon Time allowed: 2 hours
h h h
Materials
For hExaminer’s hUse
For hthis hpaper hyou hmust hhave:
the hPeriodic hTable/Data hBooklet, hprovided has han hinsert h(enclosed) Question Mark
a hruler hwith hmillimetre hmeasurements
1
a hscientific hcalculator, hwhich hyou hare hexpected hto huse hwhere happropriate.
2
Instructions 3
Use hblack hink hor hblack hball-point hpen. 4
Fill hin hthe hboxes hat hthe htop hof hthis hpage.
5
Answer hall hquestions.
You hmust hanswer hthe hquestions hin hthe hspaces hprovided. hDo hnot hwrite 6
houtside hthe hbox haround heach hpage hor hon hblank hpages. 7
If hyou hneed hextra hspace hfor hyour hanswer(s), huse hthe hlined hpages hat hthe hend 8
hof hthis hbook. h Write hthe hquestion hnumber hagainst hyour hanswer(s).
All hworking hmust hbe hshown. 9
Do hall hrough hwork hin hthis hbook. hCross hthrough hany hwork hyou hdo hnot hwant TOTAL
hto hbe hmarked.
Information
The hmarks hfor hquestions hare hshown hin hbrackets.
The hmaximum hmark hfor hthis hpaper his h105.
IB/M/Jun20/E11 7405/2
, 2
Do hnot
hwrite
Answer hall hquestions hin hthe hspaces box
h outside
hprovided.
0 1 This hquestion his habout hrates hof hreaction.
Phosphinate hions h(H2PO h–) hreact hwith hhydroxide hions hto hproduce hhydrogen hgas has
2
shown.
–h − h 2– h
H hPO h + hOH →HPO h + hH
2 2 3 2
A hstudent hcompleted han hexperiment hto hdetermine hthe hinitial hrate hof hthis hreaction.
The hstudent hused ha hsolution hcontaining hphosphinate hions hand hmeasured hthe hvolume hof
hhydrogen hgas hcollected hevery h20 hseconds hat ha hconstant htemperature.
Figure h1 hshows ha hgraph hof hthe hstudent’s hresults.
Figure h1
0 1
.1 Use hthe hgraph hin hFigure h1 hto hdetermine hthe hinitial hrate hof hreaction hfor hthis hexperiment.
hState hits hunits. hShow hyour hworking hon hthe hgraph.
[3 hmarks]
Rate h Units h
IB/M/Jun20/7405/2
, 3
Do hnot
hwrite
0 1 . 2 box
Another hstudent hreacted hdifferent hinitial hconcentrations hof hphosphinate hions hwith h outside
han hexcess hof hhydroxide hions. h The hstudent hmeasured hthe htime h(t) htaken hto
hcollect
15 hcm3 hof hhydrogen hgas. h Each hexperiment hwas hcarried hout hat hthe hsame
htemperature.
Table h1 hshows hthe hresults.
Table h1
– –3
Initial h[H2PO2 h ] h/ hmol hdm t h/ hs
0.25 64
0.35 32
0.50 16
1.00 4
State hthe hrelationship hbetween hthe hinitial hconcentration hof hphosphinate hand htime h(t).
Deduce hthe horder hof hthe hreaction hwith hrespect hto hphosphinate.
[2 hmarks]
Relationship
Order h
Question h1 hcontinues hon hthe hnext hpage
IB/M/Jun20/7405/2
