"Preparing Oxygen" Life-Sustaining Gas - Oxygen PPT Courseware

Description

"Preparing Oxygen" Life-Sustaining Gas - Oxygen PPT Courseware

Basis for drug selection

Must contain relevant ingredients (scientific)

Non-toxic, harmless and no pollution (safety)

Conditions permitting (feasibility)

Save energy and be cheap

The device is simple and easy to operate (simplicity)

1. Reaction principle

Heating potassium permanganate to produce oxygen:

Potassium permanganate → Potassium manganate + manganese dioxide + oxygen

KMnO4 → K2MnO4 + MnO2 + O2

2. Reaction device

Large test tubes, iron stands, alcohol lamps, single-hole rubber stoppers, air tubes, sinks, gas bottles, etc.

3. Experimental steps

1. Check the air tightness of the device.

2. Contain medicines. (Use a paper slot to put the medicine into the bottom of the test tube, and stuff a ball of cotton at the mouth of the test tube to prevent potassium permanganate particles from splashing and blocking the airway.)

3. Fix the test tube. (The iron clamp should be clamped one-third close to the test tube mouth, and the test tube mouth should be slightly tilted downward to prevent water from flowing back and causing the test tube to explode.)

4. Light the alcohol lamp to heat. (When heating, first preheat the test tube evenly, and then focus on heating the drug part.)

5. Collect gas. (Oxygen is denser than air, so it can be collected by the upward air exhaust method. Oxygen is not easily soluble in water, so it can be collected by the drainage and gas collection method.)

6. After the experiment is completed, first move the air tube out of the water, and then extinguish the alcohol lamp to prevent the water from flowing back and causing the test tube to burst.

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For more information about the PPT courseware "Preparation of Oxygen from Life-Sustaining Gas Oxygen", please click the "Preparation of Oxygen from Life-Sustaining Gas Oxygen ppt" tab.

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Update Time: 2024-09-08

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 1 industry PPT template

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