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SPM Chemistry A xplosive Module (Chemistry A Ticket For “U” ) GREEN ZONE [GZ]
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Section C / Bahagian C
[20 marks] / [20 markah]

Answer any one question form this section.
Jawab mana – mana satu soalan daripada bahagian ini.
9.

Shelly and Wendy carried out three sets of experiment to investigate the factors that affect the
rate of reaction. Table 9 below shows the reactants and the conditions of the reaction involved.
Shelly dan Wendy menjalankan tiga set eksperimen untuk mengkaji faktor yang
mempengaruhi kadar tindak balas. Jadual 9 di bawah menunjukkan bahan tindak balas dan
keadaan tindak balas yang terlibat.
Set I II III
3
3
-3
Reactants 25 cm of 0.2 mol dm -3 25 cm of 0.4 mol dm -3 25 cm3 of 0.2 mol dm
Bahan tindak hydrochloric acid and hydrochloric acid and hydrochloric acid and
balas excess zinc powder excess zinc powder excess zinc powder
3
3
3
25 cm asid 25 cm asid 25 cm asid hidroklorik
-3
hidroklorik 0.2 mol hidroklorik 0.4 mol 0.2 mol dm dan
-3
-3
dm dan serbuk zink dm dan serbuk zink serbuk zink berlebihan
berlebihan berlebihan
Temperature of
the mixture 30°C 30°C 40°C
Suhu campuran
Time taken to collect
3
50 cm gas 90 s 55 s 30 s
Masa yang
diambil untuk
3
mengumpul 50 cm
gas

Table 9 / Jadual 9

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