\(0=2+2 x-6\)
\(x=2\)
In the complex \(K _2 Fe \left[ Fe ( CN )_6\right]\), both the iron atoms have \(+2\) oxidation state.
Since six cyanide ions surround the iron atom, its coordination number is 6 .
The \(Fe ^{2+}\) ion in \(\left[ Fe ( CN )_6\right]^{4-}\) has outer electronic configuration of \(3 d ^6\). The complex is a low spin complex.It contains o unpaired electrons with the magnetic moment of o \(B.M.\) and is colourless.
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