Write a balanced equation of reaction. Solid potassium chlorate is heated to form solid potassium chloride and oxygen gas. Express your answer as a chemical equation. Identify all of the phases in your answer.

2KClO3 (s) → 2KCl (s) + 3O2 (g)

Explanation:

Step 1: Data given

Solid potassium chlorate = KClO3 (s)

solid potassium chloride = KCl

oxygen gas = O2

Step 2: The balanced equation

KClO3 (s) → KCl + O2

On the left side we have 3x O, on the right side we have 2x O

To balance the amount of O we have to multiply KClO3 (on the left side) by 2 and multiply O2 on the right side by 3

2KClO3 (s) → KCl (s) + 3O2 (g)

On the left we have 2x K, on the right we have 1x K.

To balanced the amount of K we have to multiply KCl on the right side by 2

Now the equation is balanced

2KClO3 (s) → 2KCl (s) + 3O2 (g)