"Published in Newark, California, USA"
A common laboratory preparation of oxygen gas is the thermal decomposition of potassium chlorate over MnO2 catalyst. Assuming complete decomposition, calculate the number of grams of oxygen gas that can be obtained from 45.7 grams of potassium chlorate.
Solution:
Consider the decomposition of potassium chlorate as follows
The number of moles of KClO3 is
The number of moles of O2 is
Therefore, the amount of oxygen gas obtained from the decomposition of KClO3 is
