Ontario-CHEM 1301-GenCheml-Fall i7-DEPT > Activities and Due Dates > Assignment

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Ontario-CHEM 1301-GenCheml-Fall i7-DEPT > Activities and Due Dates > Assignment #8 22/2017 09:00 AM 54.9/100 11/21/2017 12:45 AM Periodic Table ion 3 of 14 Sapling Learning ths question has been customized by Felix Lee Western University An ortahensiral comuelex wih 1 eledron in the outermost d subshell s ound to absorb visible ight, with the absorption maximum occurring at 511 nm. Calculate the crystal-field splitting energy, . in kJmol. Number kJ/ mol If the complex has a formula of [MHOw, what effect would replacing the 6 aqua ligands with 6 CN ligands have on A? will remain constant will increase will decrease PreviousCheck Answer Next Hint about us careers priva

Explanation / Answer

1)

we have:

wavelength = 511 nm = 5.11*10^-7 m

Find energy of 1 photon first

we have:

wavelength = 5.11*10^-7 m

we have below equation to be used:

Energy = Planck constant*speed of light/wavelength

=(6.626*10^-34 J.s)*(3.0*10^8 m/s)/(5.11*10^-7 m)

= 3.89*10^-19 J

This is energy of 1 photon

Energy of 1 mol = energy of 1 photon * Avogadro's number

= 3.89*10^-19*6.022*10^23 J/mol

= 2.343*10^5 J/mol

= 2.343*10^2 KJ/mol

Answer: 234 KJ/mol

2)

since CN- is stronger ligand as compared to H2O, delta will increase

Answer: will increase

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