Essay
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s er UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
General Certificate of Education
Advanced Subsidiary Level and Advanced Level
*8712516860*
CHEMISTRY
9701/36
Advanced Practical Skills 2
October/November 2012
2 hours
Candidates answer on the Question Paper.
Additional Materials:
As listed in the Confidential Instructions
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
Give details of the practical session and laboratory where appropriate, in the boxes provided.
Write in dark blue or black pen.
You may use a soft pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
You may lose marks if you do not show your working or if you do not use appropriate units.
Use of a Data Booklet is unnecessary.
Session
Qualitative Analysis Notes are printed on pages 15 and 16.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
Laboratory
For Examiner’s Use
1
2
3
Total
This document consists of 13 printed pages and 3 blank pages.
IB12 11_9701_36/5RP
© UCLES 2012
[Turn over
2
BLANK PAGE
© UCLES 2012
9701/36/O/N/12
3
1
You are to determine the concentration of aqueous copper(II) sulfate by titration. The concentration of Cu2+ ions in a solution can be found by reaction with an excess of aqueous iodide ions to produce iodine. The amount of iodine formed can be found by titration with thiosulfate ions, S2O32–.
For
Examiner’s
Use
FB 1 is aqueous copper(II) sulfate, CuSO4.
FB 2 is 0.100 mol dm–3 sodium thiosulfate, Na2S2O3.
FB 3 is aqueous potassium iodide, KI. starch indicator
Read through the instructions carefully before starting any practical work.
w ap eP
m
e tr .X
w om .c
s er UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
General Certificate of Education
Advanced Subsidiary Level and Advanced Level
*8712516860*
CHEMISTRY
9701/36
Advanced Practical Skills 2
October/November 2012
2 hours
Candidates answer on the Question Paper.
Additional Materials:
As listed in the Confidential Instructions
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
Give details of the practical session and laboratory where appropriate, in the boxes provided.
Write in dark blue or black pen.
You may use a soft pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
You may lose marks if you do not show your working or if you do not use appropriate units.
Use of a Data Booklet is unnecessary.
Session
Qualitative Analysis Notes are printed on pages 15 and 16.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
Laboratory
For Examiner’s Use
1
2
3
Total
This document consists of 13 printed pages and 3 blank pages.
IB12 11_9701_36/5RP
© UCLES 2012
[Turn over
2
BLANK PAGE
© UCLES 2012
9701/36/O/N/12
3
1
You are to determine the concentration of aqueous copper(II) sulfate by titration. The concentration of Cu2+ ions in a solution can be found by reaction with an excess of aqueous iodide ions to produce iodine. The amount of iodine formed can be found by titration with thiosulfate ions, S2O32–.
For
Examiner’s
Use
FB 1 is aqueous copper(II) sulfate, CuSO4.
FB 2 is 0.100 mol dm–3 sodium thiosulfate, Na2S2O3.
FB 3 is aqueous potassium iodide, KI. starch indicator
Read through the instructions carefully before starting any practical work.