Hydrogen peroxide is also called hydrogen peroxide, and its chemical expression is: hydrogen peroxide (H2O2)-MnO2-water (H2O) + oxygen (O2). So how to use hydrogen peroxide to make oxygen?
Experimental principle of producing oxygen from hydrogen peroxide: hydrogen peroxide (H2O2) ————→ water (H2O) + oxygen (O2)
The specific steps of producing oxygen from hydrogen peroxide:
①Connecting device
②Check the air tightness of the device
③Put manganese dioxide into the conical flask
④Pour the hydrogen peroxide solution
⑤Collect oxygen
Precautions for preparing oxygen from hydrogen peroxide:
① The separatory funnel can be replaced by a long-necked funnel, but its lower end should extend below the liquid surface to prevent the generated gas from escaping from the long-necked funnel;
②The catheter only needs to be slightly extended into the test tube plug
③Air tightness check: Close with a water stop clip, open the separatory funnel piston, add water to the funnel, and the water level does not continue to drop, indicating good air tightness.
④When loading medicines, first install the solids and then the liquids
⑤The advantages of the device: the start and end of the reaction can be controlled, and liquid can be added at any time.
Summary of producing oxygen from hydrogen peroxide:
If the solid (or solid + solid) is heated to generate gas, use potassium permanganate to make oxygen;
If solid + liquid produces gas at room temperature, use hydrogen peroxide to produce oxygen device.
Catalyst: A substance that can change the reaction rate of other substances in a chemical reaction, but its chemical properties and quality have not changed before and after the reaction.
