Answer:
a. KClO₃ ⇒ KCl + 1.5 O₂
b. Zn + H₂SO₄ ⇒ ZnSO₄ + H₂
c. CaCO₃ ⇒ CaO + CO₂
Explanation:
We will convert the following word equations into formula equations and then balance them using the trial and error method.
a. Potassium chlorate (I fixed a mistake here) ⇒ Potassium chloride + Oxygen
KClO₃ ⇒ KCl + O₂
We can balance this equation by multiplying O₂ by 1.5.
KClO₃ ⇒ KCl + 1.5 O₂
b. Zinc + Sulphuric acid ⇒ Zinc sulphate + Hydrogen
Zn + H₂SO₄ ⇒ ZnSO₄ + H₂
This equation is already balanced.
c. Calcium carbonate ⇒ calcium oxide + carbon dioxide
CaCO₃ ⇒ CaO + CO₂
This equation is already balanced.
