Answer:
FAS concentration = 1.61*10^-4M
Explanation:
Beer Lambert's law relates the absorbance (A) of a substance to its concentration (c) as:
[tex]A = \epsilon lc----(1)[/tex]
where ε = molar absorption coefficient
l = path length
A plot of 'A' vs 'c' gives a straight line with slope = εl
In addition absorbance (A) is related to % Transmittance (%T) as:
A = 2-log%T----(2)
For the FAS solution, the corresponding calibration fit is given as:
y = 3678(x) + 0.056
This implies that the slope = εl = 3678
It is given that %T = 25.6%
[tex]A = 2-log(25.6)=0.592[/tex]
Based on equation(1):
[tex]c = \frac{A}{\epsilon l}=\frac{0.592}{3678}=1.61*10^{-4}M[/tex]
