In the preparation of oxygen by the thermal decomposition of potassium chlorate shown below,what is the oxidation number change of the atom undergoing reduction?
2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

Question

Quizplus · Accepted Answer

In the decomposition of KClO3, chlorine is reduced from an oxidation state of +5 in KClO3 to -1 in KCl, resulting in a change of -6.

In the Preparation of Oxygen by the Thermal Decomposition of Potassium