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Grade 12th passInorganic Chemistry

What will be the correct order for the wavelengths of absorption in the visible region for the following:
[Ni(NO2)6]4-, [Ni(NH3)6]2+, [Ni(H2O)6]2+

Profile image of Harshit Singh
5 Years agoGrade 12th pass
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1 Answer

Profile image of Pawan Prajapati
5 Years ago
Answer ::

The order of the ligand in the spectrochemical series is H2O < NH3 < NO2–. Hence the wavelength of the light observed will be in the order:
[Ni(H2O)6]2+ < [Ni(NH3)6]2+ < [Ni(NO2)6]4-
Thus, the wavelength of light absorbed (E = hcλ) will be in the opposite order:
[Ni(H2O)6]2+ > [Ni(NH3)6]2+ > [Ni(NO2)6]4-


Thanks

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