Spectral Shifts: Lecture 2

What does one absorbance unit correspond to in terms of transmittance?

According to Bouguer-Lambert's law, how does the intensity of light decrease in an absorbing medium?

What is the proportionality constant in the expression log Io / It = Kb?

What does the term 'A' represent in Beer-Lambert's law A = abc?

If the unit of concentration is 1M, what is the absorptivity known as?

How can absorptivity be calculated from a plotted curve of A against C at fixed b?

What is the unit of molar absorptivity (ɛ) in Beer-Lambert's law?

'A(1%, 1cm)' is a term related to what characteristic of a substance?

'log Io/It α C' is associated with which law?

The spectrum of a substance in alkaline medium exhibits a hypsochromic shift and hyperchromic effect.

At the isosbestic point, the absorbance of a substance is pH dependent.

The oxidation of diphenylamine converts its quinonoid spectrum to the benzenoid spectrum.

The change in spectrum of a substance upon dilution is an example of the effect of temperature.

The same substance will have different spectra in polar and non-polar solvents.

The isosbestic point represents the intersection of spectra at different pH values.

Absorbance is not affected by changes in concentration at the isosbestic point.

Effect of redox reaction can convert a quinonoid spectrum to a benzenoid spectrum.

Dilution of a substance with water changes its benzenoid spectrum to a quinonoid spectrum.

The effect of solvent on a substance's spectrum can be observed by comparing spectra in different solvent types.