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TitleH032-01QPJun16
TagsProperties Of Water Redox Chemical Reactions Chemical Equilibrium Chlorine
File Size696.1 KB
Total Pages24
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© OCR 2016 [601/5256/4]
DC (NH/SW) 125468/6

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INSTRUCTIONS
• Use black ink. HB pencil may be used for graphs and diagrams only.
• Complete the boxes above with your name, centre number and candidate number.
• Answer all the questions.
• Write your answer to each question in the space provided. If additional space is

required, you should use the lined page(s) at the end of this booklet. The question
number(s) must be clearly shown.

• Do not write in the barcodes.

INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• This document consists of 24 pages.

Last name

First name

Candidate
number

Centre
number

Oxford Cambridge and RSA

AS Level Chemistry A
H032/01 Breadth in chemistry

Friday 27 May 2016 – Morning
Time allowed: 1 hour 30 minutes

You must have:
• the Data Sheet for Chemistry A

(sent with general stationery)

You may use:
• a scientifi c calculator

OCR is an exempt Charity

* H 0 3 2 0 1 *

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© OCR 2016

SECTION A

You should spend a maximum of 25 minutes on this section.

Write your answer to each question in the box provided.

Answer all the questions.

1 Which row shows the atomic structure of 37Cl–?

protons neutrons electrons

A 17 18 20

B 17 20 18

C 18 19 17

D 20 17 21

Your answer [1]

2 What is the formula of ammonium sulfide?

A NH4S

B NH4SO4

C (NH4)2S

D (NH4)2SO4

Your answer [1]

3 Calcium nitrate, Ca(NO3)2, decomposes when heated, as shown below.

Ca(NO3)2(s) CaO(s) + 2NO2(g) + ½O2(g)

A student decomposes 0.00500 mol of Ca(NO3)2 and collects the gas that is produced.

Calculate the volume of gas that the student should expect to collect, measured at room
temperature and pressure.

A 60 cm3

B 120 cm3

C 240 cm3

D 300 cm3

Your answer [1]

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SECTION B

Answer all the questions.

21 A twenty pence coin contains copper and nickel.

(a) Copper and nickel each exist as a mixture of isotopes.

State the similarities and differences between the atomic structure of isotopes of the same
element.

Similarities ................................................................................................................................

...................................................................................................................................................

Differences ................................................................................................................................

...................................................................................................................................................
[2]

(b) The copper used to make a batch of coins is analysed by mass spectrometry. The mass
spectrum is shown below.

60 61 62 63

relative
abundance

(%)

64
m / z

65 66 67 68

30.83%

69.17%

(i) Calculate the relative atomic mass of the copper used to make the coins.

Give your answer to two decimal places.

relative atomic mass = .......................................................... [2]

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(ii) One coin has a mass of 5.00 g and contains 84.0% of copper, by mass.

Calculate the number of copper atoms in one coin.

Give your answer in standard form and to three significant figures.

number of copper atoms = .......................................................... [2]

(c) Nickel(II) nitrate, Ni(NO3)2, can be prepared by reacting nickel(II) oxide with dilute nitric acid.

(i) Write the equation for this reaction.

...................................................................................................................................... [1]

(ii) Ni(NO3)2 contains the NO3
– ion. The nitrogen atom bonds to the oxygen atoms with a

single covalent bond, a double covalent bond and a dative covalent bond, as shown
below.

N
O

O–

O

Draw the ‘dot-and-cross’ diagram for the NO3
– ion, showing outer shell electrons only.

Use a different symbol for the extra electron.

[2]

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(c) The structure of compound F is shown below.

HO OHC

Compound F

C

H

CH3

CH3

H

(i) What is the empirical formula of compound F?

...................................................................................................................................... [1]

(ii) A student plans a two-stage synthesis for preparing compound F from compound B.

The synthesis first prepares compound E, as shown in the flowchart.

Draw the structure of compound E in the box and state the reagents for each stage on
the dotted lines.

Compound ECompound B

.........................

.........................

stage 1

stage 2

C

CH3

CH3

C

H

H

HO OHC

Compound F

C

H

CH3

CH3

H

[3]

END OF QUESTION PAPER

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ADDITIONAL ANSWER SPACE

If additional space is required, you should use the following lined page(s). The question number(s)
must be clearly shown in the margin(s).

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Oxford Cambridge and RSA

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