add science june 2008 higher structured

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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

Calculator Nil

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.

Examiners use only

Team Leaders use only

Question LeaveNumber Blank

1

2

3

4

5

Total

Surname Initial(s)

Signature

Centre

No.

*N33021A0112*Turn over

Candidate

No.

This publication may be reproduced only in accordance with

Edexcel Limited copyright policy.

2008 Edexcel Limited.

Printers Log. No.

N33021AW850/R1536/57570 6/5/4/28,000

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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Leave

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


(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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*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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8

*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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10

*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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11


(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)

add science june 2008 higher structured

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