Question 1 1 point During the experiment you use a cell with

Question 1 (1 point) During the experiment you use a cell with a path length of 1.00 cm. On the instrument the recorded absorbance is 0.201 for solution # 1, Knowing the absorptivity constant of FeSCN2+ is 4700 L mol 1 cm-1 at the wavelength used, calculate the concentration of FeSCN2+ in solution #1. You answer should be in M and in scientific notation. x 10-5 M (if your answer was 9.99 x 10-5 M, input your answer as 9.99) Your Answer: Answer

Solution

By using Beer Lambert Law

Absorbance = molar absorptivity constant x molar concentration x cell length

A = e x c x l

c = A/e x l

c = 0.201/ (4700 L/mol cm x 1 cm)

= 4.276 x 10^-5 M

c = 0.001 mol/L or M