An aqueous complex absorbs strongly at 528 nm. What color does the solution appear? 650 nm 580 nm R Y 750 nm 560 nm 400 nm V 430 nm 490 nm В O violet O yellow blue O red orange green

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At pH 1, superoxide ions are is largely present in water as? О НО2 O H202" O HO22- O 02 O H2022+ QUESTION 2 Au(1) complexes are aurophilic and isoelectronic with O Hg(II) O Pt(II) O Pd(1) O Ir(III) O Rh(I)

The red color of soil is often due to the presence of iron. Metal ions are extracted from soil by stirring the soil in acid and then filtering the solution. One method for the analysis of Fe2+ is to form the highly colored Fe2+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of a 10.0 ppm working solution of Fe2+ into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the standards are measured.   a)Use the data table below to prepare a calibration curve (absorbance versus concentration in ppm). Fit the data to straight line and find the equation for the straight line and the R2 value. (Hint: Think about what to do with the absorbance of the blank.)

Which one of the following substances is the product of this co -- (s) 1 + (s) IV

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

What is the NAME for the following ion? NO2 H₂ H₂ -N N Co. N₂ NO₂ mer-dinitrobis(ethylenediamine)cobaltate(III) trans-bis(ethylenediamine)dinitrocobalt(III) cis-dinitrobis(ethylenediamine)cobaltate(III) fac-di(ethylenediamine)dinitrocobalt(III) cis-di(ethylenediamine)dinitrocobalt(III)