1 answer
(click or scroll down)
To find the concentration of iron(II) in the unknown sample, we will use the equation for the calibration curve, which relates the absorbance (A) to the concentration of iron(II) ([Fe2+]). The equation given is:
A = 12.93 [Fe2+] + 0.0017
We are given the absorbance reading of the unknown sample, which is 0.106. We can substitute this value into the equation:
0.106 = 12.93 [Fe2+] + 0.0017
Now we can solve for [Fe2+] by rearranging the equation and isolating [Fe2+]:
12.93 [Fe2+] = 0.106 - 0.0017
[Fe2+] = (0.106 - 0.0017) / 12.93
Calculating this expression will give us the concentration of iron(II) in the unknown sample.
I hope this explanation helps!