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21 January, 03:37

What is the osmolarity of a solution made by dissolving 0.50 mole of the strong electrolyte cacl2 in 1.0 l of solution?

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  1. 21 January, 05:55
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    Osmolarity=osmole of the solute/litres of the solution

    ionic equation for dissociation of CaCl2 is

    CaCl2--->Ca2 + + 2Cl-

    total osmoles for reaction are 1 (Ca2+) + 2 (Cl-) = 3 osmoles

    therefore

    0.50 moles of CaCl2 x 3 osmoles / 1mole of CaCl2 = 1.5osmoles

    osmolarity=1.5 / 1.0 L=1.5 osmol/l
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