The chemical equation you provided is not balanced. It shows the reaction between barium carbonate (BaCO3), barium oxide (BaO), barium hydroxide (Ba(OH)2), and barium sulfate (BaSO4).

A balanced chemical equation for the reaction would be:

BaCO3 + BaO + 2Ba(OH)2 + 2H2SO4 → 4BaSO4 + 4H2O

This balanced equation shows the reaction where barium carbonate, barium oxide, barium hydroxide, and sulfuric acid react to form barium sulfate and water.