First write the electronic configuration from the periodic table. Then, from that, write the orbital diagram and dot structure for: 1) Sc+1 2) Ti-2 3) Co+3 4) Zn
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- When we consider the reaction of Fe3+ ion (SCN) with its ligand, by showing the ion-ligand bond in the product that may occur in the reaction; discuss why?Assign a reason for each of the following observations:(i) The transition metals (with the exception of Zn, Cd and Hg) are hard and have high melting and boiling points.(ii) The ionization enthalpies (first and second) in the first series of the transition elements are found to vary irregularly.Provide explanations of the following phenomena: The electron configuration of Ti is [Ar] 4s2 3d2, but that of Cr2+ is [Ar] 3d4.
- Many transition metals and their compounds are used as catalysts. Given MnO2, FeCl3, Pt, and Ni, which would you select for producing CCl4 from CS2 and Cl2?Write the formula and draw the structure of each of these two isomers for the dibromobis(ethylenediamine)cobalt(III) ion.Using the periodic table to locate each element, write the electron configuration of (a) V; (b) Y; (c) Hg.
- 3a) The nitrosyl ion, NO*, is a very rare case of a cationic ligand that can function as a Lewis base. Draw the Lewis structure of this ligand under consideration of the VSEPR rules and indicate any formal charges on the constituent atoms. 3b) How many electrons does the NO* ligand contribute on the ionic model and the neutral model, respectively? Assume that the Metal-N-O bonding angle is 180° upon coordination.When we consider the reaction of Ag+ ion (SCN) with its ligand, by showing the ion-ligand bond in the product that may occur in the reaction; discuss why?A coordination compound has the following composition (by mass %): 23.53% Co; 42.47% Cl, and 34.00% NH3. When 4.91 g of the compound is dissolved in 75.0 mL of deionized water, and the solution is reacted with an excess of AGNO; solution, it yields 5.60 g of AgCl precipitate. (a) Determine the empirical formula of the compound and write in the form of Co(NH;),Cl, (where x and 24. y are simple integers), and calculate its molar mass. (Assume the compound contains only one Co atom). (b) Deduce the number of chloride (Cl) as counter ions and as ligand, respectively. (c) Write the Werner's formula of the compound and give its systematic name. (Answers: (a) Co(NH3);C13; molar mass = 250.43 g/mol; (b) 2 Cl are counter ions and one is ligand; (c) [Co(NH3);CI]Cl2 = pentaammonechlorocobalt(III) chloride)
- 1. A sample of iron ore weighing 0.6428 g is dissolved in acid The iron is reduced to Fe* and titrated with 36.30 mL of a 0.1052 N solution of K,Cr207. (a) Calculate the percentage of iron (Fe) in the sample. (b) Express the percentage as Fe,03 rather than Fe. Hint: The reaction of Fe2+ with Cr,0,2 involves one electron to oxidize it to Fe*.The molecule CO is a common ligand in transition metal complexes forming a strong bond with the metal ion. b) Based on Lewis structure of CO, which end of the CO molecule do you think is the electron source to form the metal-ligand bond? Why?Give the oxidation state of the metal for each of the following oxides of the first transition series. (Hint: Oxides of formula M3O4 are examples of mixed valence compounds in which the metal ion is present in more than oneoxidation state. It is possible to write these compound formulas in the equivalent format MO∙M2O3, to permit estimation of the metal’s two oxidation states.)(a) Sc2O3(b) TiO2(c) V2O5(d) CrO3(e) MnO2(f) Fe3O4(g) Co3O4(h) NiO(i) Cu2O