Page 175 - MODUL KIMIA A+XPLOSIVE SPM (LATEST)

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SPM Chemistry A xplosive Module (Chemistry A Ticket For “U”) ANSWERS

(iv) 1

(b) (i) C 4H 9OH + 6O 2  4 CO 2 + 5 H 2O 2

P1 - correct reactant & product
P2 – balance chemical equation

(ii) P1 – no of mole / Bilangan mol 3

No of mole =

= 0.1 mol

P2 – compare mol ratio/ banding nisbah mol
1 mol C 4H 9OH  4 mol CO 2
0.1 mol C 4H 9OH  0.4 mol CO 2

P3 – volume of CO 2/ isipadu CO 2
Volume of CO 2 = 0.4 x 24
3
= 9.6 dm (with unit)

10 marks

SECTION B

NO MARK SCHEME MARKS
3+
2+
7(a) P1. Fe ion release electron to form Fe
3+
2+
ion Fe melepaskan elektron membentuk Fe

2+
P2. Fe ion undergoes oxidation
2+
Ion Fe mengalami pengoksidaan

3+
2 –
P3. Cr 2O 7 ion accept electron to form Cr ion
2 – 3+
Ion Cr 2O 7 menerima elektron membentuk Cr

2 –
P4. Cr 2O 7 ion undergoes reduction 4
2 –
Ion Cr 2O 7 mengalami penurunan

Sektor Pembelajaran, Jabatan Pendidikan Negeri Sabah | 2020 174