Answer:
The concentration is [tex]C = 1.11 mol/L[/tex]
Explanation:
From the question we are told that
The absorbance is [tex]A = 0.347[/tex]
The length is [tex]l = 447 nm = 447 *10^{-7} \ cm[/tex]
Generally absorbance is mathematically represented as
[tex]A = \epsilon* C * l[/tex]
where [tex]\epsilon[/tex] is the molar absorptivity of FeSCN2 with a value [tex]\epsilon = 7.0*10^3 L/cm/mol[/tex]
and [tex]C[/tex] is the equilibrium concentration of FeSCN2
So
[tex]C = \frac{A}{\epsilon * l }[/tex]
substituting values
[tex]C = \frac{0.347}{7.0*10^{3} * 447 *10^{-7} }[/tex]
[tex]C = 1.11 mol/L[/tex]
