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1. Mix thoroughly about 5grams of potassium chlorate with one gram of Mn Dioxide in a watch glass. Transfer the mixture into the ignition/generator tube. Heat the generator tube slowly. Allow few bubbles to escape before collecting oxygen into the test tubes. fill atleast 3 test tubes and cover with cork under water.
3. ignite one end of strip Mg Ribbon and drop it into a test tube of oxygen. cool the tube and add 5ml of water. shake the mixture and test it with litmus paper, observe.
B. Preparation
1. How is O2 gas collected? Why could this method be done?
Describe the physical properties of O2?
O2 can be collected over water because it has a pretty low solubility in water.
O2 is a colourless, odourless gas which is slightly more dense than air.
I am sure that you can look up its melting point and boiling point. Liquid oxygen is blue.
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