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The stability of complex ion depend upon...

The stability of complex ion depend upon charge, size electronegativity of metal ion. Greater the charge of metal ion greater would be the stability. As size of metal ion decreases stability of metal ion increases complex ion more stable if chelating ligand present.
`Fe^(+3)+6CN^(-)hArr[Fe(CN)_(6)]^(-3),K_(1)`
`Fe^(+2)+6CN^(-)hArr[Fe(CN)_(6)]^(-4),K_(2)` : the value of `K_(1)` and `K_(2)` are

A

`1.8xx10^(6),1.2xx10^(31)`

B

`1.8xx10^(6),1.8xx10^(6)`

C

`1.2xx10^(31),1.2xx10^(31)`

D

`1.2xx10^(31),1.8xx10^(6)`

Text Solution

Verified by Experts

The correct Answer is:
D
Stability of complex ion, `alpha` Charge of metal ion `alpha=(1)/("size of metal ion")`
Hence, order of stability `[Fe..(CN)_(6)]^(4-)lt[Fe..(CN)_(6)]^(3-)impliesK_(2)ltK_(1)`
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