Why in a laboratory practice should the determinationof chromium VI be done by the diphenylcarbazidemethod (obtaining a pink solution) if chromium VI inwater gives a yellow solution? Is it a problem that thewater solution of only chromium VI is yellow? Is itbecause a yellow solution absorbs at approximately 400nm?

The determination of chromium VI (Cr(VI)) in water using the diphenylcarbazide (DPC) method rather…

Answered: Why in a laboratory practice should the…

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter19: Transitition Metals, Coordination Chemistry And Metallurgy

Section: Chapter Questions

Problem 19.37QE

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How did Werner first explain bonding in complexes Tetraaminecarbonatocobalt(III) nitrate and pentaamminechlorocobalt(II)chloride
When a job's plot method was conducted on the iron(lI)-Sulfosalicylic Acid complex, the maximum absorbance was determined to be 0.546 at 506nm. At this absorbance, 0.0016M, 6.50ml SSA was added to 0.0016M, 4.00ml of Iron(ill). What is the stoichiometric ratio between metal and ligand (Fe-SSA)? What is the concentrations of Iron(II) and SSA after mixing? What is the affinity constant of the metal-ligand complex, Bearing in el - 3050M, where e is molar absorptivity and l is path length. Edit View Insert Format Tools Table
The concentration of iron in a solution can be determined using UV?Vis spectrophotometry by reacting the iron with 1.10-phenanthroline to produce a colored complex. The following data were obtained for a series of standard solutions of iron/1,10-phenanthroline complex measured in a 1.00 cm cell. Concentration (M) Absorption 0.50x10-4 0.109 1.0x10-4 0.218 2.0x10-4 0.436 3.0x10-4 0.656 4.0x10-4 0.872 a.Prepare a Beer’s law plot using the above data b.Calculate the concentration of an iron 1, 10-phenanthroline complex solution that has an absorbance of 0.317 c.Calculate the molar absorptivity of the iron/1, 10-phenanthroline complex
A lab student analyzed his/her cool nickel-en complex for ethylenediamine, en, content. A g sample of the synthesized Ni-en complex was dissolved in about 50 mL of water and tuuatca with 0.186 M HCl (aq). Endpoint required 20.16 mL of the HCl (aa). What is the mass (in grams) of en in the Ni-en complex analyzed? Show ALL work
The absorbance of a 0.1 M solution of a complex was 0.15 at max. What is the value of molar absorptivity for this complex? What is the geometry of this complex?
QUESTION 16 3) Arrange the complexes in order of increasing rate of substitution by water. Assume that the complexes are all in a strong-field electron configuration. [Cu(NH3e (Ma(NH3\2* (CHNHe* O a) The order of increasing rate of substitution by water is [Cr(NHak?* > (Mn(NH3)* > [Cu(NH3lel* (Most reative) (Least reative) O b) The order of increasing rate of substitution by water is [Mn(NH3)e2 > (CrNHale* > (Cu(NHalel (Most reative) (Least reative) O c) The order of increasing rate of substitution by water is (C(NH3le)2* > [Cu(NHa > (Mn(NH3)6)+ (Least reative) O d) The order of increasing rate of substitution by water is [CUNH3)e > (CH{NH3)e* > [Mn(NH3}}?* (Most reative) (Most reative) (Least reative)
Application of Tanabe-Sugano diagram and how does it predict the color of a complex.
Give the systematic name for the following coordination compound or complex ion: Question 7 of 12 0₂NH3 Pd H3N cis- Reset NO₂ mer-trans- fac-( (¹\)) ((1)) (()) ((II)) (ion) (III) tetra tris bis di tri ammine nitrosyl amido nitro nitrato azido palladium platinum palladate platinate plumbate Delete Submit +
(17) The formula of the coordination compound is given as: [(NH3)4Fe. Fe(NH3)4](NO3)3 Provide the name the compound a) p-hydroxide- u-peroxobis(tetrammineiron(III)) nitrate b) p-hydroxo-u-peroxobis(tetrammineiron(III)) nitrate c) -hydroxo- p-peroxobis(tetrammineiron(III)) trinitrate d) p-hydroxo- u-dioxobis(tetrammineiron(IIl)) nitrate e)hydroxo- H-peroxobis(tetramidoiron(III)) nitrate
Question: What is the origin of the color of transition metal complexes, and how is it related to their electronic structure?
14. In the determination of Kf for the iron thiocyanate complex, what is the color of the complex? at what wavelength do we record our %T? Explain why it would be difficult to obtain reliable results if the absorbances had been measured at 675 nm?
Electronic spectra of transition metals complexes are deduced from the term symbols. Please provide 2 other processes that can lead to intense light absorption in transition metal complexes

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