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- 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.)Quickly plezz!! The levigating agent role in Suppositories manufacturing ??Scott test is one of the methods used for screening for Cocaine in Forensic Chemistry. The multi step method consists of a) reacting the sample drug with cobaltous thiocyanate b) dissolving of the formed precipitate by adding HCl and c) extraction of coordination compound with Chloroform d) measurement of absorbance of extracted coordination compound at 627 nm All the reactions in this multistep method are not fully understood. However, it was determined that there are 2 moles of cocaine in coordination compound measured in last step. If coordination compound is represented as “Scott” coordination compound, which of the following is correct “stoichiometric” factor to get mass of cocaine from mass of measured complex ? a.g (Scott coordination cpd) * MM (Scott coordination cpd) MM (cocaine) b.g (Scott coordination cpd) * 2 *MM (Scott coordination cpd) MM…
- By using the given 1) electronic absorption spectrum, 2) the Tanabo-Sugano diagram for d3 complex in octahedral ligand field and 3) the absorption/emission spectra, explain the following: a) Ligand field states (to support your explanation show the filling of the orbitals) b) Radiative transitions (to support your explanation refer to fluorescence, phosphorescence and Stokes’ shift)the spectrochemical series allows us to explain the variety ofcolors observed in transition metal complexes. But in practice, someone attempting to predictthe properties of compounds can occasionally be frustrated by various complicating factors.For instance, the nitrite ligand is presented as having a high field strength, but that is only whenit is the nitrogen of the nitrite that is coordinating to the metal center. Nitrite is also capable ofbinding to the metal center through an oxygen, and when this happens, nitrite is a low fieldstrength ligand. Furthermore, many metals initially precipitate as simple ionic salts before theyhave a chance to form more soluble complex ions. And occasionally, unexpected redoxreactions can lead to complex mixtures. Despite these complications, the spectrochemical series remains a powerful predictivetool for inorganic chemists. New ligands are being developed all the time, and each new ligandneeds to be placed, at least approximately, on the…the spectrochemical series allows us to explain the variety ofcolors observed in transition metal complexes. But in practice, someone attempting to predictthe properties of compounds can occasionally be frustrated by various complicating factors.For instance, the nitrite ligand is presented as having a high field strength, but that is only whenit is the nitrogen of the nitrite that is coordinating to the metal center. Nitrite is also capable ofbinding to the metal center through an oxygen, and when this happens, nitrite is a low fieldstrength ligand. Furthermore, many metals initially precipitate as simple ionic salts before theyhave a chance to form more soluble complex ions. And occasionally, unexpected redoxreactions can lead to complex mixtures. The complex that copper forms with chloride ions is tetrahedral. Write the chemical formula for this complex. Thoroughly describe the energy diagram for the d orbitals.
- the spectrochemical series allows us to explain the variety ofcolors observed in transition metal complexes. But in practice, someone attempting to predictthe properties of compounds can occasionally be frustrated by various complicating factors.For instance, the nitrite ligand is presented as having a high field strength, but that is only whenit is the nitrogen of the nitrite that is coordinating to the metal center. Nitrite is also capable ofbinding to the metal center through an oxygen, and when this happens, nitrite is a low fieldstrength ligand. Furthermore, many metals initially precipitate as simple ionic salts before theyhave a chance to form more soluble complex ions. And occasionally, unexpected redoxreactions can lead to complex mixtures. Despite these complications, the spectrochemical series remains a powerful predictivetool for inorganic chemists. New ligands are being developed all the time, and each new ligandneeds to be placed, at least approximately, on the… What is the mechanism of action of cisplantine as an anticancer agent? Try to draw the electronic configuration of cisplatine showing the hybridization mechanism, complex electronic configuration and the shape of this complex molecule? Which electron pairs with be shared to the vacant dsp2platinium ion vacant orbital from Cl and amine groups of cisplatine.You have been sent to India to investigate the occurence of goiter disease attributed to iodine deficency. As part of of your investigation, you must make field measurements of traces of Iodide(I-) in groundwater. The procedure is to oxidize I- to I2 and convert the I2 into an intensely colored complex with the dye brilliant green in the organic solvent toluene. a) A 3.15x10^-6 M solution of the colored complex exhibited an absorbance of 0.267 at 635nm in a 1.00cm cuvet. A blank solution made from distilled water in place of groundwater had an absorbance of 0.019. Find the molar absroptivity of the colored complex. b)The absorbance of an unknown solution prepared from ground water was 0.175. Find the concentration of the unknown.
- Sketch structure of Mo(DMe) Cl2 (NMe,)2 , thhen apply ean to this complex showing ligand analysis and oxidation state analysisWhen Alfred Werner was developing the field of coordinationchemistry, it was argued by some that the opticalactivity he observed in the chiral complexes he hadprepared was due to the presence of carbon atoms in themolecule. To disprove this argument, Werner synthesizeda chiral complex of cobalt that had no carbon atoms in it,and he was able to resolve it into its enantiomers. Design acobalt(III) complex that would be chiral if it could be synthesizedand that contains no carbon atoms. (It may not bepossible to synthesize the complex you design, but we willnot worry about that for now.)Blue LED used as illlumination and Yellow LED used as detector. Explain at Molecular basis detail for beer's lambert law the effect of it and what will happen if you will choose this LED color.
