What would be the osmotic pressure

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What would be the osmotic pressure (in Osmoles) of a 0.2 M Calcium Chloride solution and if a 1 Osmole solution freezes at -1.86 Celsius, what would be the freezing point of this solution? (Assume full dissociation, i.e. activity coefficient of 1.0)

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What would be the osmotic pressure : What would be the osmotic pressure (in Osmoles) of a 0.2 M Calcium Chloride solution and if a 1 Osmole solution freezes at -1.86 Celsius, what would be the freezing point of this solution? (Assume full dissociation, i.e. activity coefficient of 1.0)
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