You examined the spectrum of green food dye, which had a transmittance minimum a

Question

You examined the spectrum of green food dye, which had a transmittance minimum at about 630 mn.

Does permanganate have a shorter or longer wavelength at its minimum transmittance?

Is the difference between permanganate's energy levels more or less than in the green food dye?

"Sharp" and "Broad" are terms that refer to the approximate width in nm of an absorption or emission peak. Comparing your spectrum for permanganate ion in solution to the bright line spectra od Hydrogrn or Helium( which you observed in the spectroscope), is the peak in the solution absorption spectrum sharper or boader than the individual bright lines in the emission spectrum of the gas phase atoms?

Does this correspond to greater or fewer possibilities for the separation of the energy levels of permanganate in solution compared to Hydeogen and Helium in the gas phase?

Explanation / Answer

1) permanganate can absrob maximum at 510 nm , so it has shorter wavelenght at its minimum transmittance

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