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- Give an example of a double salt that can be formed via ligand exchange and give the reactions involvedMolecular nitrogen (N2) can act as a ligand in certaincoordination complexes. Predict the structure of [V(N2)6],which is isolated by condensing V with N2 at 25 K. Is thiscompound diamagnetic or paramagnetic? What is theformula of the carbonyl compound of vanadium that hasthe same number of electrons?Is the interaction between an ammonia ligand and a metal cation a Lewis acid–baseinteraction? If so, which species acts as the Lewis acid?
- Why is the pH of the medium important for the formation of chelated complexes between metal ions and ligands? Choose the best answer: Select one: a. Because the ligands give rise to acid-base reactions that influence the stability of the chelate b. Because if the pH is not very acidic, the ligands do not protonate and the complex cannot form c. Because the pH of the medium is always important for any type of reaction. d. Because in the absence of pH there is no reaction of any kindFill in the blanks : (i) When a ligand has a two-complexing or donor group in its structure, it is said to be————— (ii) ___________are compounds whose colour changes when they bind to a metal ion. (ii) If you double the wavelength, you will observe. ________the energy. (iv) In_____________ titration, we monitor changes in absorbance during the titration to find out the equivalence point. (v) Two liquids are_____________ if they form a single phase when they are mixed in any ratio. (vi) The efficiency of Chromatographic Columns can be described by____________Equation.You prepare a solution of protein and its ligand where the initial concentrations are [Protein] = 10 nM and [Ligand] = 10 nM. At equilibrium you measure the [PL] = 5 nM. If the protein - ligand association can be represented by: P + L <--> PL What is the dissociation constant (Kd) of the protein for the ligand under the solvent conditions you have chosen? a. 1 nM b. 0.2 nM-1 c. 5 nM d. 10 nM
- 19. The association constant of protein X for ligand Y is: 100 micromolar. At what concentration of ligand is half fo the protein bound?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.For the aqueous [Ni(NH3 )6]2+ complex Kf=5.50 x 108 at 25C . Suppose equal volumes of 0.0024 M Ni(NO3 )2solution 0.94M NH3solution are mixed. Calculate the equilibrium molarity of aqueous Ni2+ ion. Round your answer to 2 significant digits.
- Will methylamine (CH3NH2) be a monodentate or abidentate ligand? With which of its atoms will it bind to ametal ion?For the aqueous [Ag(CN)2]^- complex Kf =3.0x10^20 at 25°C.Suppose equal volumes of 0.0068M AgNO3 solution and 0.32M KCN solution are mixed. Calculate the equilibrium molarity of aqueous Ag^+ ion.Round your answer to 2 significant digits.(a) [Cr(II)(H2O)6]2+ and [Cr(III)(H2O)6]3+ display markedly different ligand exchange rates. Which species is likely to be more labile and what are the reasons for this? (b) The hexaquachromium(III) ion is violet, but addition of excess cyanide produces the yellow hexacyanidochromate(III) ion. Explain the change in colour between the two complexes.