Page 480 - SUBSEC October 2017_Neat

02212032/CAPE/SPEC/MS/2017
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CHEMISTRY
UNIT 2 — PAPER 032
MARK SCHEME

Question 1

S.O.: Module: 2 ----3.3
KC UK XS
(a) Data

Candidate’s reading for M1. [1 mark]

Colour changes from blue/green to white. [2 marks]

Candidate’s reading for M2. [1 mark]

Blue/green mixture. [1 mark]
10

First washing: light blue/green [1 mark]
Second washing: colourless [1 mark]

Candidate’s reading for M3. [1 mark]

2 marks for 3 correct units
[1 mark for 1 - 2 correct units]
[2 marks]

(b) (i) M1 – M2 = [1 mark] 1

(ii) M2 – M3 = [1 mark] 1

M  M
(iii) 1 2 = P [1 mark] 1
18

M  M
2 3 = Q [1 mark]
63 5 . 1

P Q
/ [1 mark] 1
Q P

5 10

Total 15 marks

(a)