Thursday, September 22, 2011

ഓക്സിജനുണ്ടാക്കാം

 
 ഓക്സിജനുണ്ടാക്കാം
PROJECT TITLE:
Production of Oxygen

Aim:
To produce oxygen by Priestley's method


Materials Required:
1. Test tube
2. Glowing splint
3. Mercuric oxide



Procedure:


Place some red mercuric oxide in a small test tube and heat for several minutes. Hold a glowing splint at the mouth of the tube. Note what happens to the splint and watch the sides of the test tube.


Observation:
You will notice that the glowing splint is relighted and tiny grey beads are produced on the sides of the test tube.


Inference:
The gas that relights a glowing splint is the same gas obtained by Priestley when he heated red oxide of mercury. It is oxygen. The grey beads are beads of mercury.

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