State the molar absorptivities for methyl red in its acid

Reference no: EM13164379

The molar absorptivities for methyl red in its acid form are 44640 M^-1cm^-1 @ 524 nm and 3860 M^-1cm^-1 @ 425nm and for methyl red in its base form are 740 M^-1cm^-1 @ 524nm and 18530 M^-1cm^-1 @ 425nm. The acid dissociation constant (Ka) of methyl red of a solution of pH=5.61 is 1.37*10^-5. Using the molar absorptivities for methyl red in its acid form given above, calculate the percentage of methyl red acid form in a solution with absorbances of 0.207 at 524 nm and 0.455 at 425 nm.

Reference no: EM13164379

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