Chemistry Form 4 Experiment 5.1 [verified]

: To study the differences in properties between ionic compounds and covalent compounds. Problem Statement :

Insert electrodes into the solid sample and observe the bulb.

: Ionic compounds are soluble in water but insoluble in organic solvents, whereas covalent compounds are insoluble in water but soluble in organic solvents. Add a small amount of Magnesium chloride (ionic) and Naphthalene chemistry form 4 experiment 5.1

To study the differences in properties between ionic and covalent compounds. 1. Electrical Conductivity Hypothesis

To investigate the reactivity of magnesium, aluminium, zinc, iron, and copper with oxygen. : To study the differences in properties between

It was. The zinc was tearing the copper out of the solution. The chemical equation wrote itself in Maya’s mind: Zinc + Copper(II) sulphate → Zinc sulphate + Copper.

The solution turned from vibrant blue to a pale, cloudy colourless. The reddish-brown solid was pure, elemental copper. Zinc was the hero. Add a small amount of Magnesium chloride (ionic)

This is a common trick question. Thermochemistry (energy calculations) proves Aluminium is more reactive than Zinc. However, because Aluminium has an extremely strong and coherent oxide layer, it appears less reactive. Once that layer is breached (by sanding or by mercury), it reacts explosively.

“Today,” she had announced, her voice crackling through the lab’s humid air, “you are all forensic chemists. A factory has spilled three different metals—magnesium, zinc, and copper—into a vat of copper(II) sulphate solution. Your job is to determine which metal is the ‘hero’ that reacts, and which are the ‘villains’ that remain inert.”