Question

Consider this reaction and answer the questions:

Answer 1

Balanced chemical reaction: 2KClO₃ → 2KCl + 3O₂.
Potassium is metal from first group of Periodic table of elements, it has always oxidation number in compound +1.
Chlorine in the reactant state has oxidation number +5 (+1 + x + 3 · (-2) = 0) and it is reduced to -1 (+1 + x = 0) in the product state.
Oxygen in the reactant state has oxidation number -2 (+1 + 5 + 3 · x = 0) and it is oxidized to 0 (in molecule of oxygen) in the product state.

Answer 2

1. What is the oxidation number of chlorine in the reactant state?.....+5
2. What is the oxidation number of oxygen in the reactant state?.....-2
3. What is the oxidation number of potassium in the reactant state?.....+1
4. What is the oxidation number of chlorine in the product state?.....-1
5. What is the oxidation number of oxygen in the product state?.....0
6. What is the oxidation number of potassium in the product state? .....+1

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