Question

the following reaction is used for the preparation of oxygen gas in the laboratory 2kclo3->2kcl+3o2

Answer 1

yes oxygen can be obtained from oxygen containing salts like chlorate permanganates etc

Answer 2

Potassium chlorate is KClO3 and the decomposition looks like this...

2KClO3 ==> 2KCl + 3O2

4.50 g KClO3 x 1 mole/122.55 g = 0.0367 moles

0.0367 moles KClO3 x 3 moles O2/2 moles KClO3 = 0.0245 moles O2 (see mo

le ratio in balanced equation)

mass of O2 = 0.0245 moles O2 x 32 g/mole = 0.784 g O2 formed