Chemistry Form 4 Experiment 5.1 Info

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.

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.

“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. chemistry form 4 experiment 5.1

“Exothermic,” Maya whispered, recording the temperature rise. The magnesium was even more reactive than zinc. It had ripped the copper from the solution with such force that it generated heat.

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. Lin dropped a small piece of copper wire

Only the blue solution. Nothing happened. It remained still, a calm witness.

“Look!” Lin gasped. “The blue is disappearing! And… is that copper metal?” Ravi carefully dropped a few granules of zinc

It was a Thursday afternoon, and the Form 4 Science lab smelled of antiseptic and old wood. Maya, Lin, and Ravi huddled over their workstation, a neat row of four test tubes clamped to a metal stand. Their teacher, Puan Aishah, had given them a puzzle.