Posted by
**jared** on
.

An unknown was prepared with the concentration of 0.000331 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1646.3 M–1 . The expected absorbance and %T values for the diluted aspirin solution prepared by the student is

and , respectively.

i know u get the expected absorbance by just multiplying the concentration by the slope, but how do you get the %T (transmittance)?

What value did you obtain for A? Let's just make up a number, say A = 0.600

Then A = log (1/T)

0.600 = log (1/T)

Take the inverse log (the antilog) of both sides to give

3.98 = 1/T

and T = 1/3.98 = 0.251

and %T = 25.1%