consider the following equilibrium
Co(H2O)62+(aq) + 4 Cl-(aq) CoCl42-(aq) + 6 H2O(g)
Kequilibrium =[CoCl42-][H2O]6/[Co(H2O)62+][Cl-]4
[H2O] is taken as 1
Kequilibrium =[CoCl42-]/[Co(H2O)62+][Cl-]4
Kequilibrium =0.306/0.76*(0.193)4
Kequilibrium =0.306/(1.05 *10-3)
Kequilibrium =290.187
temperature T =40C =273 +4 =277K
we know
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