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Heating calcium propanoate ((CH₃CH₂COO)₂Ca) forms pentan-3-one (CH₃CH₂COCH₂CH₃) and releases CO₂ as a byproduct.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Reactions due to α-Hydrogen - Aldol, Cannizzaro and Acidity of Carboxylic Acids
Reaction: Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O. Moles of Ca(OH)₂ ≈ 0.1838 mol. 1 mol Ca(OH)₂ produces 1 mol CaSO₄; mass ≈ 25 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Laws of Chemical Combination - Conservation Mass Definite Multiple
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