Chemical Experiment Report "Drainage Gas Collection Method"

Experimental name: Drainage gas collection method Experimental principle: Oxygen is not easy to accommodate water instruments: potassium permanganate, manganese dioxide, air pipe, test tube, gas cylinder, alcohol lamp, sink experiment steps: 1 inspection ---- Check the air tightness of the unit.

2 Pack----Load medicine, plug with rubber plug with catheter

3 clips----Use the iron clip to fix the test tube on the iron stand, and tilt the tube slightly downwards, and the medicine is laid on the bottom of the test tube.

4 o'clock----point the alcohol lamp, heat the tube, and discharge the air inside the tube.

5 Receipt---- Collecting oxygen by drainage method.

6 Take----take the catheter out of the sink.

7 off----extinguish the alcohol lamp.
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Experimental name: Exhaust air method Experimental principle: Oxygen density is greater than air Instrument: Potassium permanganate, manganese dioxide, air tube, gas cylinder, test tube experiment steps: put the gas bottle mouth up, then pass the gas Put the catheter into the bottle, and then put a piece of frosted glass on the bottle mouth. When the collection is full, take the tube and then cover the frosted glass.