Iron (Fe) solution, it\'s volume is 250 ml, we took 2.5 ml and treated it with 1

Question

Iron (Fe) solution, it's volume is 250 ml, we took 2.5 ml and treated it with 1,10-Phenanthroline and diluted it in a 250 ml flask with distilled water, and the absorption was found to be ( A=0.120 ). Calculate the concentration of the Fe in the original solution in (ppm) units.
Given: Molar for Ferrion complex = 11100 (M^-1)
Atomic weight of Fe = 56
Iron (Fe) solution, it's volume is 250 ml, we took 2.5 ml and treated it with 1,10-Phenanthroline and diluted it in a 250 ml flask with distilled water, and the absorption was found to be ( A=0.120 ). Calculate the concentration of the Fe in the original solution in (ppm) units.
Given: Molar for Ferrion complex = 11100 (M^-1)
Atomic weight of Fe = 56
( A=0.120 ). Calculate the concentration of the Fe in the original solution in (ppm) units.
Given: Molar for Ferrion complex = 11100 (M^-1)
Atomic weight of Fe = 56

Explanation / Answer

A = 0.120

e = 11100 M-1 cm-1

path length = 1.0 cm

A = e C b

0.120 = 11100 x C x 1.0

C = 1.08 x 10^-5 M

original concentration

C x 2.5 = 1.08 x 10^-5 x 250

C = 0.22575 M

C = 0.22275 x 10^3 / 56 (mg /L)

C = 3.978 ppm

concetration = 3.978 ppm

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