$05$ Cd $25C-0\mathrm{.}41$ V $.C{d}^{2+}C{N}^{-}Cd(CN{)}_4^{2-}(K_f,$ formation constant$)?.Cd|C{d}^{2+}(0\mathrm{.}01,M)||C{d}^{2+}(0\mathrm{.}01,M),C{N}^{-}(0\mathrm{.}1M)|Cd$