SolutionHard

Question

In which case, van′t Hoff factor i remains unchanged ? [Assume common complexes of these ions]

Options

A.PtCl4 reacts with KCl
B.aq. ZnCl2 reacts with aq. NH3
C.aq. FeCl3 reacts with aq. K4[Fe(CN)]6
D.KMnO4 reduced to MnO2 in alkaline medium (MnO2 a black ppt)

Solution

i remains unchanged when number of ions before and after complex ion remains constant.
          Solute      y          Complex        y
        (a) PtCl4     5         K2[PtCl6]           3
        (b) ZnCl2     3        Zn[(NH3)4]Cl2    3

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