This document consists of 18 printed pages and 2 blank pages.
(DR/DR) T46257/2
© UCLES 2008
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
General Certificate of Education Ordinary Level
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
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.
Write your answers in the spaces provided in the Question Paper.
The number of marks is given in brackets [ ] at the end of each question or part question.
At the end of the examination, fasten all your work securely together.
CHEMISTRY
5070/04
Paper 4 Alternative to Practical
May/June 2008
1 hour
Candidates answer on the Question Paper.
No additional materials are required.
For Examiner’s Use
2
5070/04/M/J/08
For
Examiner’s
Use
© UCLES 2008
1 The diagram below shows a pipette.
What error has been made in its manufacture?
25
cm3
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[Total: 1]
3
5070/04/M/J/08
[Turn over
For
Examiner’s
Use
© UCLES 2008
2 A student was given some hydrated sodium carbonate crystals, Na2CO3.xH2O, where x is a
whole number. They were placed in a previously weighed container, which was reweighed.
mass of container + sodium carbonate crystals
= 9.87 g
mass of container
= 5.83 g
(a) Calculate the mass of sodium carbonate crystals used in the experiment.
.......................................g [1]
The container and crystals were heated to remove the water of crystallisation and then
reweighed. This process was repeated until there was no further change in mass.
(b) Describe the appearance of the sodium carbonate crystals after heating.
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