Potassium chlorate decomposes to potassium chloride and oxygen gas. Is this a physical or chemical change?

1 Answer
anor277
Nov 2, 2016

This process is clearly an example of chemical change.

Explanation:

Chemical change is characterized by the formation of new substances, and the making and breaking of strong chemical bonds.

Here, we have the reaction:

#KClO_3(s) + Delta rarr KCl(s) + 3/2O_2(g)uarr#

This reaction works best with a little #MnO_2# catalyst. Clearly, strong chemical bonds have been broken, and reformed in new substances.

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