Using the absorbance of [FeSCN]+2 at the wavelength of maximum absorption which you obtained in part B, and the diameter of the tube, obtained in part A,calculate the molar extinction coefficient.
Using the absorbance of [FeSCN]+2 at the wavelength of maximum absorption which you obtained in part B, and the diameter of the tube, obtained in part A,calculate the molar extinction coefficient.
given info:
Concentration of Fe3+ stock solution, C1 = 0.001 M
Volume of stock Fe3+ solution pipetted, V1 = 25mL
Concentration of diluted stock solution, C2 = 0.0004 M
Volume of Fe2+ solution and KSCN (upon mixing) = 10mL
Weight of KSCN = 1g
The reaction taking place is given as:
The reaction taking place is given as:
F
e
3+
(aq) + SC
N
−
(aq) ⇔Fe
[SCN]
2+
(aq)
the concentration of [FeSCN]2+ after the mixing of Fe3+ and SCN- is 2.5 x 10-3 M.
Moles of [FeSCN]2+ = 2.5 x 10-5 moles
Diameter:1.2cm
The wavelength at which maximum absorption takes place is
= 480 nm
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