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Preparation, Properties and Uses of Oxygen Gas

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Preparation, Properties and Uses of Oxygen Gas

Question

Oxygen gas in the laboratory can be prepared by heating potassium nitrate.
a. Write the equation of the reaction to show the decomposition of potassium nitrate
b. State One physical properties of oxygen gas
c) State One use of oxygen gas

Answer

a) 2KNO3 → 2KNO2(s) + O2(g)

b) The common physical properties of oxygen are:
1. It is a colourless gas
2. It is odourless
3. It is slightly soluble in water.

c) Oxygen is used in hospitals with patients with breathing difficulties.