Chemical Reaction Essay

Wednesday 16 January 2013 – Morning
AS GCE CHEMISTRY A
F322/01

Chains, Energy and Resources

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Candidates answer on the Question Paper.
OCR supplied materials:
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Data Sheet for Chemistry A (inserted)

Duration: 1 hour 45 minutes

Other materials required:
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Scientific calculator

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INSTRUCTIONS TO CANDIDATES
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The Insert will be found in the centre of this document.
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Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters.
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Use black ink. HB pencil may be used for graphs and diagrams only.
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Answer all the questions.
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Read each question carefully. Make sure you know what you have to do before starting your answer. •
Write your answer to each question in the space provided. If additional space is required, you should use the lined pages at the end of this booklet. The question number(s) must be clearly shown. •
Do not write in the bar codes.
INFORMATION FOR CANDIDATES
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The number of marks is given in brackets [ ] at the end of each question or part question.
Where you see this icon you will be awarded marks for the quality of written communication in your answer.

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This means for example you should:
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ensure that text is legible and that spelling, punctuation and grammar are accurate so that meaning is clear;
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organise information clearly and coherently, using specialist vocabulary when appropriate.
You may use a scientific calculator.
A copy of the Data Sheet for Chemistry A is provided as an insert with this question paper.
You are advised to show all the steps in any calculations.
The total number of marks for this paper is 100.
This document consists of 24 pages. Any blank pages are indicated.

© OCR 2013 [H/500/7834]
DC (NH/JG) 58561/2

OCR is an exempt Charity

Turn over

2
Answer all the questions.
1

Crude oil contains many hydrocarbons.
The table shows information about some of these hydrocarbons.
Hydrocarbon

Molecular formula

Boiling point / °C

Hexane

C6H14

69

3-Methylpentane

C6H14

63

2,2-Dimethylbutane

C6H14

50

(a) What is the empirical formula of hexane?
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(b) Explain why hexane is both saturated and a hydrocarbon. saturated ...................................................................................................................................................
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hydrocarbon
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[2]
(c) Draw the skeletal formula for 2,2-dimethylbutane.

[1]
(d) Describe and explain the trend shown by the boiling points of the hydrocarbons in the table.
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