*JAN20Ch0101*
IB/M/Jan20/E12
CH01
For Examiner’s Use Question
Mark 1  2  3  4  5  6  7
TOTAL
Wednesday 15 January 2020  07:00 GMT Time allowed: 1 hour 30 minutes
Materials
For this paper you must have:
• the Periodic Table/Data Sheet, provided as an insert • a ruler with millimetre measurements
• a scientific calculator, which you are expected to use where appropriate.
Instructions
• Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all  questions.
• You must answer the questions in the spaces provided.  Do not  write  outside the box around each page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of  this book.  Write the question number against your answer(s). • All working must be shown.
• Do all rough work in this book.  Cross through any work you do not want  to be marked.
Information
• The marks for questions are shown in brackets. • The maximum mark for this paper is 70.
INTERNATIONAL AS
CHEMISTRY (9620)
Unit 1:  Inorganic 1 and Physical 1
Do not write
outside the Answer all questions in the spaces provided.
box
0    1 This question is about iron and its isotopes.
0    1 . 1 State, in terms of fundamental particles, the difference between two isotopes of iron.
[1 mark]
0    1 . 2 State why different isotopes of iron have the same chemical properties.
[1 mark]
0    1 . 3    A sample of iron was ionised in a time of flight (TOF) mass spectrometer by
electron impact.
Write an equation, including state symbols, for this ionisation.
[1 mark]
*02*
IB/M/Jan20/CH01
Turn over ►IB/M/Jan20/CH01 Do not write outside the
box
*03*
4
*04*
IB/M/Jan20/CH01
Do not write outside the
box
0    1 . 5
Iron reacts with dilute hydrochloric acid to form iron(II) chloride and a gas.
Write an equation for this reaction.  [1 mark]
0    1 . 6
Iron forms the compound iron(III) sulfate.
What is its formula? [1 mark]
Tick ( ) one  box.
Fe(SO 4)3
Fe 2(SO 4)3
Fe 3SO 4
5
*05*
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IB/M/Jan20/CH01 Do not write outside the
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0    2 This question is about reactions of inorganic compounds.
0    2 . 1 Identify a reagent that can be used in a simple test-tube reaction to distinguish
between aqueous barium chloride and aqueous magnesium chloride.
State what is observed.
[3 marks]
Reagent
Observation with aqueous barium chloride
Observation with aqueous magnesium chloride
0    2 . 2    A mixture contains solid sodium carbonate and solid sodium sulfate.
Describe how a pure sample of solid sodium sulfate can be obtained from the mixture.
[3 marks]react to do

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