Page 31 - Ranger PT3 2022 science

Science PT3 Chapter 4 Reactivity of Metals
3. The following activity shows the reactivity of several metals towards oxygen.

Potassium
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manganate(VII) Glass wool Metal powder

Heat Heat
Diagram 4.3
(a) Metal powder is heated strongly. Then, potassium manganate(VII) crystals
are heated.
(b) The result from this activity is as follows:
Metal Reaction with oxygen Product formed
Metal burns vigorously and brightly with
Magnesium white shiny flame Magnesium oxide
Aluminium Metal burns vigorously and brightly Aluminium oxide
Zinc Metal burns with bright bluish green flame Zinc oxide
Iron Metal glows with mild yellow flame Iron oxide
Lead Metal glows dimly Lead oxide
(c) In the above activity, the potassium manganate(VII) crystals are used to
supply oxygen.
(d) The reactivity of metals used in this activity in descending order is:
Magnesium Aluminium Zinc Iron Lead

Position of Carbon in the Reactivity Series of Metals
1. The activity below is carried out to determine the position of carbon in
reactivity series of metal.

Crucible
Mixture of metal oxide
and carbon
Wire gauze

Tripod stand
Form 3

Diagram 4.4
Form 3

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