13.2 Factors that affect the colour of complex ions (HL)

Applications and skills:
Explanation of the effect of the identity of the metal ion, the oxidation number of the metal and the identity of the ligand on the colour of transition metal ion complexes.

[@andreespina9747]

thanks for all the videos!! really helpful for reviewing for my test tomorrow

[@Raazzzaan]

رزقكَ اللهُ الجنةَ

[@danielannan2174]

أمين يا رب

[@estefaniavelasquez7540]

Amazing video

[@kaarmukhilnilavan9495]

Hi, Can you please explain me that why are the electrons exited from energy level 2 instead of energy level 1? Emission also takes place only upto energy level 2. While the hydrogen has only one electron at n=1 both excitation and emissions are mentioned from (till) the energy level 2!

[@marcoostuni7831]

2:45 how does the wavelength absorbed decrease if the wavelength transmitted is also a lower wavelength?

[@MSJChem]

The violet solution absorbs yellow light and the blue solution absorbs orange light. The energy gap is larger for the violet solution which corresponds to a shorter wavelength.

[@marcoostuni7831]

@@MSJChem Ohhhhh makes sense, thanks very much for all you do

[@rassimsimou1594]

Good

[@cellsubs6352]

Hello Sir. I know that we use colorimeter to see the colour change but I wonder whether drawing a calibration curve is necessary.

[@MSJChem]

A Calibration curve is necessary if you want to know the concentration of a solution.

[@nejsnek1410]

Hi, where do you cover the effect of the geometry of the complex ion on the energy difference of the splitting d-orbitals? I could not find a video on the topic 3 playlist

[@MSJChem]

I don’t have a video on that because it is not required as part of the syllabus. Students only need to know the effect of changing the ligand using the spectrochemical series.

[@RaphaelPerez0904]

can a anion or cation effect the color of the solution?

[@MSJChem]

The splitting of the d orbitals of a central metal ion is affected by the ligands bonded to the central metal ion. Different ligands cause different splitting.