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Centre Number Candidate Number

Edexcel GCE
Chemistry
Advanced Subsidiary
Unit 1: The Core Principles of Chemistry

Wednesday 3 June 2009 ­ Morning Paper Reference

Time: 1 hour 15 minutes 6CH01/01
Candidates may use a calculator. Total Marks




Instructions
· Use black ink or…

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SECTION A

Answer ALL the questions in this section. You should aim to spend no more than 20 minutes on
this section. For each question, select one answer from A to D and put a cross in the box .
If you change your mind, put a line through the…

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3 Some mean bond enthalpy values are given in the table below.

Bond Mean bond enthalpy / kJ mol­1
H H +436
I I +151
H I +299

What is the enthalpy change for the reaction shown below in kJ mol­1?

H2(g) + I2(g) 2HI(g)
A +436 + 151 ­…

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5 17.1 g of aluminium sulfate, Al2(SO4)3, was dissolved in water.

Calculate the number of sulfate ions, SO42­, present in the solution formed.

[Assume the molar mass of Al2(SO4)3 is 342 g mol­1 and the Avogadro Constant is
6 × 1023 mol­1.]
A 3 × 1021
B 1 × 1022…

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7 The first five successive ionization energies of an element, X, are shown in the table
below.

Ionization
first second third fourth fifth
energy
Value
590 1100 4900 6500 8100
/ kJ mol­1

Which ion is X most likely to form when it reacts with chlorine?

A X+
B X2+…

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10 Which of the following substances, obtained from the fractional distillation of crude oil,
has the lowest boiling temperature?
A refinery gas

B kerosene

C diesel oil

D lubricating oil

(Total for Question 10 = 1 mark)


11 Sodium hydrogensulfate, NaHSO4, reacts with sodium hydroxide, NaOH, as shown below.

NaHSO4(aq)…

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13 Which pair of atomic numbers represents elements which are both in the p-block of the
Periodic Table?
A 4, 8

B 6, 12

C 8, 16

D 10, 20

(Total for Question 13 = 1 mark)


14 The electronic structure of an atom of an element in Group 6…

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16 The electronic configurations of the atoms of four different elements are given below.
For which element would you expect the value of the first ionization energy to be the
largest?

A 1s1
B 1s2

C 1s2 2s1

D 1s2 2s2

(Total for Question 16 = 1 mark)


17 Which…

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19 Which of the following does not have exactly 10 electrons?

A An ion of fluorine, F­
B A molecule of methane, CH4

C A molecule of nitrogen, N2

D An ion of sodium, Na+

(Total for Question 19 = 1 mark)


20 Which of the following statements correctly describes…

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SECTION B

Answer ALL the questions. Write your answers in the spaces provided.
21 This question is about hydrocarbons.
(a) Liquefied petroleum gas (LPG) is a fuel sold as an alternative to petrol. It is a
mixture of liquefied C3 and C4 alkanes.
(i) Suggest a reason why the alkanes…

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