Experiment 4.2 Chemistry Form 4 -

To determine the reactivity trend of Group 17 (chlorine, bromine, iodine).

2M(s) + 2H₂O(l) → 2MOH(aq) + H₂(g) (Alkali metal + water → metal hydroxide + hydrogen) experiment 4.2 chemistry form 4

To investigate the reactivity of Group 1 elements (Li, Na, K) with water & oxygen. To determine the reactivity trend of Group 17

Reactivity decreases down Group 17: Cl > Br > I Chlorine can displace bromine & iodine; bromine can displace iodine only. experiment 4.2 chemistry form 4

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