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Which of the following solutions would have the highest osmotic pressure?
0.15 M KCl
0.2 M C6H12O6
0.2 M C12H22O11
0.15 M CaCl2

  • Chemistry -

    pi = i*M*RT.
    i = van't Hoff factor.
    i = 2 for KCl
    i = 1 for C6H12O6
    i = 1 for C12H22O11
    i = 1 for CH3COOH
    i = 3 for CaCl2

    Note that you don't need to actually calculate pi to do this; i.e., R and T are constants; all you need are i and M. i*M is the determining factor.

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