First, you need to calculate the absorbance for all the tramitance you have in the data above, as you did part A but with every solution.
Once you have that, from the first chart you are putting in the first sheet, graph those values according to beer law which is:
A = EbC
Where A is absorbance, E is molar absorptivity, b is length of the cubet (usually 1 cm) and C is concentration.
So, you have to plot a graph of A vs C. Doing that with those data, we have the following results:
y = 4.6372x10-3 + 4786.85x ---> r2 = 0.9994
With this plot,all you have to do now, is replace the value of absorbance you got, and then solve for x (Concentration). For example, for the value you calculated in part A, the concentration would be:
0.09 = 4.6372x10-3 + 4786.85C
0.09 - 4.6372x10-3 = 4786.85C
C = 0.09 - 4.6372x10-3 / 4786.85
C = 1.783x10-5 M
Do this for all the values calculated of absorbance from your data, and you should get the concentration.
Hope this helps
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