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Paper Reference(s)
5018H/1H 5038H/1H
Edexcel GCSEAdditional Science (5018H)
Chemistry (5038H)C2 Topics 5 to 8
Higher TierThursday 5 June 2008 Morning
Time: 30 minutes
Materials required for examination Items included with question papers
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Instructions to Candidates
In the boxes above, write your centre number, candidate number, your surname, initial(s) andsignature, and complete the paper reference.Check that you have the correct question paper.Answer ALL the questions. Write your answers in the spaces provided in this question paper.Do not use pencil. Use blue or black ink.Show all stages in any calculations and state the units. Calculators may be used.Include diagrams in your answers where these are helpful.
Information for Candidates
The marks for individual questions and the parts of questions are shown in round brackets: e.g. (2).There are 5 questions in this question paper. The total mark for this paper is 30.There are 12 pages in this question paper. Any blank pages are indicated.
Advice to Candidates
You are reminded of the importance of clear English and careful presentation in your answers.
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2
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5
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Surname Initial(s)
Signature
Centre
No.
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Candidate
No.
This publication may be reproduced only in accordance with
Edexcel Limited copyright policy.
2008 Edexcel Limited.
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Paper Reference (complete below)
H 1 H
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2
*N33021A0212*
ThePeriodicTableoftheElements
*Thelanthanoids(atomicnum
bers58-71)andtheactinoids(atomicn
umbers90-103)havebeenomitted.
Therelativeatomicmassesofcopperandchlorinehavenotbeenrou
ndedtothenearestwholenumber.
1
2
3
4
5
6
7
0
Key
1Hhydrogen
1
4Hehelium
2
7Li
lithium
3
9Be
beryllium
4
re
lativeatomicmass
atomicsymbol
name
ato
mic(proton)number
11B
boron
5
12C
carbon
6
14N
nitrogen
7
16O
oxygen
8
19F
fluorine
9
20Neneon10
23Na
sodium
11
24Mg
magnesium
12
27Al
aluminium
13
28Si
silicon
14
31P
phosphorus
15
32S
sulfur
16
35.5Cl
chlorine
17
40Arargon18
39K
potassium
19
40Ca
calcium
20
45Sc
scandium
21
48Tititaniu
m
22
51V
vanadium
23
52Cr
chromium
24
55Mn
manganese
25
56Fe
iron
26
59Co
cobalt
27
59Ni
nickel
28
63.5
Cu
copper
29
65Zn
zinc
30
70Ga
gallium
31
73Ge
germanium
32
75As
arsenic
33
79Se
selenium
34
80Br
bromine
35
84Krkrypto
n
36
85Rb
rubidium
37
88Sr
strontium
38
89Y
yttrium
39
91Zrzirconium
40
93Nb
niobium
41
96Mo
molybdenum
42
[98]
Tc
technetium
43
101
Ru
ruthenium
44
103Rh
rhodium
45
106Pd
palladium
46
108Ag
silver
47
112
Cd
cadmium
48
115In
indium
49
119Sn
tin50
122Sb
antimony
51
128Te
tellurium
52
127I
iodine
53
131Xexe
non
54
133Cs
caesium
55
137Ba
barium
56
139
La*
lanthanum
57
178Hf
hafniu
m
72
181Ta
tantalum
73
184W
tungsten
74
186Re
rhenium
75
190
Os
osmium
76
192Ir
iridium
77
195Pt
platinum
78
197Au
gold
79
201
Hg
mercury
80
204Tl
thallium
81
207Pb
lead
82
209Bi
bismuth
83
[209]
Po
polonium
84
[210]
At
astatine
85
[222
]
Rnradon86
[223]
Fr
francium
87
[226]
Ra
radium
88
[227]
Ac*
actinium
89
[261]
Rfrutherfor
dium
104
[262]
Db
dubnium
105
[266]
Sg
seaborgium
106
[264]
Bh
bohrium
107
[277]
Hs
hassium
108
[268]
Mt
m
eitnerium
109
[271]
Ds
darmstadtium
110
[272]
Rg
roentgenium
111
Elementswithatomicnumbers112-116havebeenreportedbutnotfully
authenticated
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Turn over*N33021A0312*
BLANK PAGE
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blank
4
*N33021A0412*
1. The structures of four compounds A, B, C and D are shown.
(a) Fill in the names of compounds A, B and C.
O C O
A B
............................... ...............................
C D
............................... ethanol
(2)
(b) Some hydrocarbons are alkanes and some are alkenes.
(i) What is a hydrocarbon?
................................................................................................................................
................................................................................................................................
(1)
(ii) Which of the compounds A, B, C and D are hydrocarbons?
................................................................................................................................
(1)
H
C
H
H
H
C
H
H
H
C
H
H
H
C
H
H
H
C
H
C C
H
C
H
H
H
O H
H
C
H
H
C
H
H
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5
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(c) When each of the compounds A, B, C and D is shaken with bromine water, only one
gives the colour change orange to colourless.
Which compound gives this colour change?
Explain why.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(2)
(d) Decane, C10H22, can be cracked.
One molecule of decane forms one molecule of ethene and one other molecule ofanother substance.
Complete the equation for this reaction.
C10H22 ........................................ + ........................................
(2) Q1
(Total 8 marks)
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6
*N33021A0612*
2. Sodium reacts with chlorine to form the ionic compound sodium chloride.
(a) An atom of sodium has an atomic number of 11 and a mass number of 23.
Complete the table to show the numbers of particles in this atom.
particle number of particles
electrons
neutrons
protons
(2)
(b) An atom of sodium and an atom of chlorine are shown in the diagram.
Describe the movement of electron(s) that occurs when a sodium atom reacts with a
chlorine atom to form sodium and chloride ions.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(2)
Na Cl
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(c) Sodium chloride has a high melting point.
Explain why.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(1)
(d) Sodium chloride conducts electricity when it is molten.
Explain why.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(1) Q2
(Total 6 marks)
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*N33021A0812*
3. In the 1970s the Sanko Company produced a type of drug called a statin. The statin
was produced in a fermentation reaction. The drug was designed to lower the level ofcholesterol in the blood. This reduces the risk of heart attacks.
(a) Why are drugs tested before they are given to humans?
.......................................................................................................................................
.......................................................................................................................................
(1)
(b) A Scandinavian study on a statin looked at the effect of taking the statin on the
number of heart attacks in a given time. The study produced the following results.
number of people number of peoplesuffering a heart attack
taking statin 2221 194
not taking statin 2223 333
What do the results show?
.......................................................................................................................................
(1)
(c) Another drug, aspirin (C9H8O4), can be made in the reaction below. The relative
formula mass of each substance is shown beneath its formula.
C7H6O3 + C4H6O3 C9H8O4 + C2H4O2
relative formula masses 138 102 180 60
Use the equation
atom economy =mass of useful product
total mass of products 1100%
to calculate the atom economy for the production of aspirin.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
atom economy = .....................%
(1) Q3
(Total 3 marks)
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*N33021A01012*
4. Dominic heated iron wool (fine iron wire) and plunged it into a gas jar of chlorine.
(a) The iron glowed brightly when it was plunged into the chlorine.
What does this show about the reaction between the iron and chlorine?
.......................................................................................................................................
(1)
(b) Write the balanced equation for this reaction, which produces iron(III) chloride,
FeCl3.
.......................................................................................................................................
(2)
(c) Chlorine reacts with iron faster than bromine does.
Bromine reacts with iron faster than iodine does.
Use the electronic configurations of chlorine and bromine to explain why the halogens
become less reactive as the atomic number increases.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(2)
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(d) Dominic used iron wool in his experiment. When he repeated it with a lump of iron
of the same mass, the reaction was much slower.
Explain, in terms of particles, why iron wool reacted faster than the lump of iron.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(2) Q4
(Total 7 marks)
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*N33021A01212*
5. Ethene reacts with steam at 300 C and 65 atm to form ethanol.
C2H4(g) + H2O(g) C2H5OH(g)
The forward reaction is exothermic.
(a) How would the yield of ethanol at equilibrium change if the temperature was
increased?
Explain your answer.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(2)
(b) A higher pressure would increase the yield of ethanol at equilibrium.
Suggest why a higher pressure is not used.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(1)
(c) In terms of the bonds broken and formed during the reaction, explain why the forward
reaction is exothermic.
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................(3)
TOTAL FOR PAPER: 30 MARKS
END
Q5
(Total 6 marks)