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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

In water, the chromium(II) ion, [Cr(H2O)6]2+, absorbs light with a wavelength of about 700 nm. What color is the solution?

Interpretation Introduction

Interpretation: The color of the light absorbed by the given complex ion has to be determined.

Concept introduction: The transition metal atoms have tendency to form complex compounds that are linked to the certain neutral or ionic species which leads to the formation of coordination compounds. There exists a large number of coordination compounds that have a large number of applications in the chemical industry as well as in daily life.

The properties of the coordination compounds depend upon the primary and secondary valancy of the metal ion in the coordination sphere. The electrical conductivity depends upon the number of ions that are produced by complex.

The strong-field ligands results in pairing of electrons present in the complex and leads to diamagnetic species , while the low-field ligand do not have tendency to pair up the electrons therefore forms paramagnetic species.

The strong field ligands lead to splitting to a higher extent than the weak field ligands and the wavelength of light absorbed depends on the energy gap that is produced by a particular ligand in which the energy gap in d orbital splitting lies on the wave length of visible region.

Visible region: The electromagnetic radiation in range of 400700nm is regarded as visible region which is actually visible to human eyes.

Explanation

The strong field ligands lead to splitting to a higher extent than the weak field ligands and the wavelength of light absorbed depends on the energy gap that is produced by a particular ligand in which the energy gap in d orbital splitting lies on the wave length of visible region.

When the electron gets excited from lower to higher levels the energy gap lies in visible region was absorbed and the corresponding complementary color was shown by the complex...

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