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CuSO(4).5H(2)O is blue in colour while C...

`CuSO_(4).5H_(2)O` is blue in colour while `CuSO_(4)` is colourless. Why?

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In `CuSO_(4).5H_(2)O`, four molecules of `H_(2)O` are present as ligand and so crystal field splitting occurs. Hence `d-d` transition is possible and `CuSO_(4).5H_(2)O` shows blue colour. In anhydrous `CuSO_(4)` there are no `H_(2)O` molecules present as ligand and so crystal field splitting is not possible. Hence it has no colour.
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CHHAYA PUBLICATION-COORDINATION COMPOUNDS OR COMPLEX COMPOUNDS-SOLVED NCERT EXEMPLAR PROBLEMS
  1. Arrange the following complex ions in increasing order of crystal fiel...

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  2. Why do compounds having similar geometry have different magnetic momen...

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  3. CuSO(4).5H(2)O is blue in colour while CuSO(4) is colourless. Why?

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  4. Name the type of isomerism when ambidentate ligands are attached to ce...

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  10. Assertion (A) : Toxic metal ions are removed by chelating ligands. R...

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  11. Assertion (A) : [Cr(H(2)O)(6)]Cl(2) and [Fe(H(2)O)(6)]Cl(2) are reduci...

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  12. Assertion (A) : Linkage isomerism arises in coordination compounds con...

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  13. Assertion (A) : Complexes of MX(6) and MX(5)L type (X and L are unide...

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  14. Assertion (A) : [Fe(CN)(6)]^(3-) ion shows magnetic moment correspondi...

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  15. Using crystal field theory, draw energy level diagram, write electroni...

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  16. Using crystal field theory, draw energy level diagram, write electroni...

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  17. Using valence bond theory, explain the following in relation to the co...

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  18. CoSO(4)Cl.5NH(3) exists in two isomeric forms 'A' and 'B'. Isomer 'A' ...

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  19. What is the relationship between observed colour of the complex & wave...

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  20. Why are different colour observed in octahedral and tetrahedral comple...

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