Chemistry Form 4 Experiment 5.1 < Deluxe >

The solution turned from vibrant blue to a pale, cloudy colourless. The reddish-brown solid was pure, elemental copper. Zinc was the hero.

Ravi carefully dropped a few granules of zinc into the next tube. For a moment, nothing. Then, a miracle. The deep blue colour began to bleed away from the zinc, as if an invisible eraser was moving upwards. Simultaneously, a reddish-brown dust started to bloom on the surface of the zinc granules, like rust forming in fast-forward.

Lin dropped a small piece of copper wire into the blue liquid. They waited. One minute. Two. The copper sat at the bottom like a sleeping snake. The blue remained blue. chemistry form 4 experiment 5.1

The more reactive metal (magnesium or zinc) acts as the displacer, while the less reactive metal (copper) is displaced. The reactivity series is not just a list—it is a hierarchy of chemical power.

He dropped the ribbon into the final bath of blue. The solution turned from vibrant blue to a

Maya, the cautious one, read the steps aloud. “First, we label four test tubes. One is the control.”

“Last one,” Ravi whispered, holding the magnesium ribbon with a pair of tongs. Puan Aishah wandered over. “Careful, Ravi. This one is dramatic.” Ravi carefully dropped a few granules of zinc

The experiment was simple, yet dangerous to a careless hand. Procedure 5.1: Investigate the reaction of metals with the salt solution of another metal.

“Don’t be a hero yet,” Lin warned, pouring 2 cm³ of the deep, sapphire-blue copper(II) sulphate solution into each tube. The liquid was beautiful, like a piece of the ocean trapped in glass.