What is the stable oxidation state of Calcium in the primary constituent of Plaster of Paris? — s Block Elements Chemistry Question

💡 Solution & Explanation

Plaster of Paris is Calcium sulphate hemihydrate ($CaSO_4 \cdot 0.5H_2O$). Calcium is an alkaline earth metal (Group 2) and strictly exhibits an oxidation state of $+2$ in all its stable compounds.