Why absorbance is higher for methyl red in a 0.2 volume fraction of ethanol than in 0.1 volume fraction of ethanol?

06 June 2014 1 4K Report

As above.

Higher the dielectric constant of the solvent lower the absorbance of dye. Here 0.1 volume fraction of ethanol has high dielectric constant in comparison to 0.2 volume fraction of ethanol. So, the methyl red in 0.1 volume fraction of ethanol has low absorbance whereas the methyl red in 0.2 volume fraction of ethanol has high absorbance.

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