Q.
For the reactions and their equilibrium constants given below,
$CuCl _{4}^{2-}+ Br ^{-} \rightleftharpoons CuCl _{3} Br ^{2-}+ Cl ^{-} ; K_{1} $
$CuCl _{3} Br ^{2-}+ Br ^{-} \rightleftharpoons CuCl _{2} Br _{2}^{2-}+ Cl ^{-} ; K_{2} $
$CuCl _{2} Br _{2}^{2-}+ Br ^{-} \rightleftharpoons CuClBr _{3}^{2-}+ Cl ^{-} ; K_{3} $
$CuClBr _{3}^{2-}+ Br ^{-} \rightleftharpoons CuBr _{4}^{2-}+ Cl ^{-} ; K_{4}$
The equilibrium constant, $K$ for the reaction
$CuCl _{4}^{2-}+3 Br ^{-} \rightleftharpoons CuClBr _{3}^{2-}+3 Cl ^{-}$, is
KVPYKVPY 2009Equilibrium
Solution: