What is the stable oxidation state of Calcium in the primary constituent of Plaster of Paris? — s Block Elements Chemistry Question
Question
What is the stable oxidation state of Calcium in the primary constituent of Plaster of Paris?
Answer: 2
💡 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.
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