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- (9)(Inorganic) SbCl3 is a white solid that must be protected from water, as it reacts immediately to form oxychlorides. With donor ligands such as amines, it forms adducts of the SbCl3.2L type. In contrast, SbI3 is deep red in color, likewise, although more slowly, it hydrolyzes with water. When it forms compounds of the Sbl3.2L type with amines, the color disappears. Compare and explain these observations. 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.Explain why the complex [Fe(H2O)6]3+ has Do = 14,000 cm-1, while [Fe(H2O)6]2+ has Do = 9,350 cm-1.
- 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)What is the effect on the reported concentration of iron in the sample if there is a trace impurity of Fe2+in the ammonium citrate?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.)Sequential formation constants for the water molecule substitution reactionby Br- ions in the hexaaquacadmium complex ion (II) are: Kf1 = 36.3; Kf2 = 3.47; Kf3 = 1.15; Kf4 = 2.34.Explain the factors that influence the formation constant and why Kf4 is greater than Kf3.
- The compound X2Y is only partially dissociated in water solution to form X+ and Y2- ions. A 0.0100 m solution is found to freeze at - 0.040°C. Calculate the apparent percent dissociation of X2Y. Kf for water = 1.86°C/m. 42 % 56 % 58 % 79 % 85 %Chemistry Ethylenediamine is a highly corrosive liquid that also forms coordination complexes with many metals provided that the pH is adjusted to make a suitable concentration of the free base available. The neutral ethylenediamine molecule, ordinarily given the symbol en, contains two nitrogen base functions, so the fully protonated form of en would be written something like H2en2+. a. Write balanced chemical equations for their equilibria involving en in water. b. A solution initially containing 0.050 M ethylenediamine is adjusted to pH 10.0 with HCl. What is the actual molar concentration of the uncharged ethylenediamine form under these conditions?19. The association constant of protein X for ligand Y is: 100 micromolar. At what concentration of ligand is half fo the protein bound?
- Consider the solvatochromic complex, [Mo(bipy)(CO)4]. The complex has a MLCT peak in the UV-vis spectrum. This peak is at 533 nm in acetonitrile solvent and at 584 nm in benzene solvent. In a 50:50 acetonitrile:benzene mixture, the peak is at 559 nm. Is the mixture of acetonitrile and benzene immediately surrounding the [Mo(bipy)(CO)4] molecules less than, equal to, or greater than a 50:50 mixture (acetonitrile:benzene)? Justify your answer. (HINT: Do you need to convert the wavelengths to a more appropriate unit?)according to Werner, which valency is not ionisable in a complex compound, primary or secondary ?Determine the formula for a complex ion with metal ion X+2 and ligand Y-1 from the following Job's plot. A) XY+1 B) XY4-2 C) XY6-4 D) XY5-3 E) XY2 F) XY3-1