Experiment 4.2 Chemistry Form 4 ✭
To determine the reactivity trend of Group 17 (chlorine, bromine, iodine).
Cl₂(aq) + 2KBr(aq) → 2KCl(aq) + Br₂(aq)
Wear goggles & use small pieces only. Potassium reacts violently! experiment 4.2 chemistry form 4
#ChemistryForm4 #Experiment4_2 #Halogens #DisplacementReaction #SPM
To investigate the reactivity of Group 1 elements (Li, Na, K) with water & oxygen. To determine the reactivity trend of Group 17
Here’s a clear and engaging post about based on the typical Malaysian SPM curriculum (KSSM). The experiment usually focuses on Periodic Table – Reactivity of Group 1 (Alkali Metals) or Group 17 (Halogens) .
2M(s) + 2H₂O(l) → 2MOH(aq) + H₂(g) (Alkali metal + water → metal hydroxide + hydrogen) 2M(s) + 2H₂O(l) → 2MOH(aq) + H₂(g) (Alkali
Halogens are toxic & corrosive – work in a fume hood or well-ventilated area.
Reactivity decreases down Group 17: Cl > Br > I Chlorine can displace bromine & iodine; bromine can displace iodine only.
