Activity Two: Some Interesting Chemistry: Go on Use It

Crystallization

Aim: To observe the crystals of given crystalline solids
Apparatus: Beaker, Stirrer, Watch Glass, Tripod stand, Wire gauge, Burner, Hand lens.
Chemicals: Potassium Permanganate (KMnO4), Potassium Dichromate (K2Cr2O7), Oxalic Acid
Procedure:
Take 50 ml of water in a beaker.
Dissolve KMnO4 in it until no more can be dissolved.
Heat the solution, simultaneously dissolving more of KMnO4.
Stop heating when no more KMnO4 can dissolved
Put a drop of this saturated solution on the watch-glass and let it cool.
Observe the crystals using a hand-lens.
Follow steps 1 to 6 for other two chemicals.
It is important that not only these three chemicals should be studied but a lot other chemicals should be used. (Try and bugger with any other thing you can find in your/ our lab. Mostly School labs do not contain any Exploding Chemicals!!!)