Solubility of Ca(OH)2 in glycerol-water solutions at various temperatures

  • Salil Puranik


Calcium hydroxide is sparingly soluble in water and completely soluble in Glycerol. It dissolves quantitatively in a glycerol-water solution. To estimate its solubility in the glycerol-water system, two independent methods are employed in this work. Conductometric measurements show that conductance of saturated solution of Ca(OH)2 decreases with an increase in the percentage of the glycerol indicating a decrease in solubility. However volumetric determination of the same saturated solution show increase in the amount of dissolved  Ca(OH)­2. It indicates that the addition of glycerol allows more calcium hydroxide to dissolve but prohibits its dissociation in a glycerol-water mixture. A proper selection of the ratio of water: Glycerol would work as a good solvent for Calcium hydroxide at the desired temperature