A spectrophotometric method for the determination of Fe (II) is based on the measurement of the red-orange color of its complex with o-phenanthroline. The complex obeys Beer's law for Fe (II) concentrations lower than 9 ppm. It is known that a solution containing 0.100 ppm of Fe(II) in excess of o-phenanthroline produces an absorbance of 0.200 in a cuvette with 1.00 cm of optical path and that an unknown sample gives an absorbance of 0.470 under the same conditions, Calculate: a) The concentration of Fe in the unknown sample in moles/L and ppm. b) The molar absorptivity coefficient of the complex. Fact. Fe = 55.845

What is the spin-only magnetic moment for the [NiCl4]Cl2 complex?

Name the following complex ions. formula 3+ [Fe(H₂O)]³+ [Cu(NH,), + [Ti(11,0), J** [Ti(H₂ name 0 0 X Ś ?

What is the total electron count of this complex? H. BArF4 СудР— Со— РСУ2 ČH;SiMe3 2 Q-z-I

The absorbance of iron is determined at 508 nm. From the information given in the laboratory handout, what do you think the visible absorption spectrum of the iron complex [Fe(phen)3]2+ looks like?

You measured the absorbance values at selected wavelengths for one of the complexes above.  Record those values below, as well as the identity of your chosen complex.  Determine your estimate for the wavelength of maximum absorbance (λmax), and show your calculations for the energy of d-orbital splitting, Δ. 0.10 M Ni(NO)2 : 10 drops approximately 0.50 mL  Chosen complex: (Ethylenediamine) C2H4(NH2)2 + Ni(NO)2 (10 drops, hot temperature, light purple color)   Wavelength (λ) nanometers Absorbance 400 nm 0.438 450 nm 0.047 500 nm 0.094 550 nm 0.184 600 nm -0.043 650 nm -0.066 700 nm -0.0125 750 nm -0.121 800 nm -0.218