Later, as they washed the test tubes, Ravi looked at the reddish-brown copper residue stuck to the glass. “It’s like a chemical war,” he said. “The strong kick the weak out of their homes.”
Only the blue solution. Nothing happened. It remained still, a calm witness. chemistry form 4 experiment 5.1
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. Later, as they washed the test tubes, Ravi
Ravi, whose fingers were always a little too eager, held a small coil of magnesium ribbon. It looked like a piece of dull, grey tinsel. “This looks harmless,” he smirked. Nothing happened
“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.