Answer:
To calculate the concentration [FeNCS+2] we use the data shown in the curve (Absorbance vs Concentration).
As we can see, the linear equation for absorbance at 447.1nm, given the values of m and b is:
[tex]Abs=5748X-0.05559[/tex]
Where X is the concentration [FeNCS+2] in mol/L.
In the table we are given the values of absorbance and we need to calculate the corresponding concentration. Therefore we rearrange the equation:
[tex]X=\frac{Abs+0.05559}{5748}[/tex]
Now we only have to use the absorbance values given in the table to calculate the concentration. The values and results are:
[tex]\begin{gathered} Absorbance:\text{ 0.218} \\ Concentration:4.76 \\ \\ Absorbance:0.256 \\ Concentration:5.42 \\ \\ Absorbance\text{: 0.366} \\ Concentration:7.33 \\ \\ Absorbance:0.337 \\ Concentration:6.83 \end{gathered}[/tex]
