7. In an aqueous solution, HgCl2 partially forms double HgCl4 molecules, and in benzene it is in the form of simple molecules. Calculate the equilibrium constant of this reaction at 25 C using the following data for the equilibrium distribution of HgCl2 between water and benzene, mmol/l:
In water 232.16 157.78 11.20 64.76 7.38 1.845
In benzene 17.39 12.22 8.80 5.24 0.618 0.155

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