Madeline H.

asked • 12/14/19

Calculate the osmolarity of a 2.5% solution of calcium chloride

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Bijan M. answered • 02/14/20

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2.5% solution means 2.5 grams per 100mL of solution.

Calcium chloride is CaCl2 with molecular weight of 111g/mole

When it dissolves, there will be 3 ionic moieties in solution, one calcium ion, and 2 chloride ions. So the Osmolarity will be 3 times the molarity.

3 x 2.5g / 111g/mol / 0.1L = 0.7 OsM

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