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- (i) What type of non-stoichiometric point defect is responsible for the pink colour of LiCl?(ii) What type of stoichiometric defect is shown by NaCl?What is the reason of starting with Co(II) complex instead of Co(III) in experiment of preparation and solution conductivity of [Co(NH3)4CO3] and [Co(NH3)5Cl] Cl2 ?Discuss the binding mode and geometry of the imido and cyclopentadienyl ligands in the tungsten complex below.
- A. Consider three possible ways in which Cu2+ could sorb to a hematite surface: (1) outer-sphere sorption, (2) inner-sphere sorption, and (3) precipitation as a Cu(II)-hydroxide. Describe the differences in the coordination environment - i.e. identify of the nearest atomic neighbours and interatomic distance within 0.5 nm (5 Å) of a given Cu(II) ion - of each sorption process. You are welcome to draw a schematic illustration to help clarify your text.Explain why Anodic Stripping Voltammetry (ASV) is considered superior over analytical techniques in terms of detection limit.What type of stochiometric defect is shown by (i) ZnS and (ii) CsCl?
- Which of the following statements is true regarding the iron-phenanthroline method? I. Any wavelength of radiation can be utilized with no change in the results. II. Blank correction must be performed to account for any absorbing species other than the analyte in the solution. III. This method can be used to discriminate and quantify the Fe3+ and Fe2+ content in the sample. II and III I and II III only II onlyb. Given that the cuvette path length was 1.17 cm, use the slope of this line to calculate the molar absorptivity of the cobalt complex at this wavelength. (Assume Beer’s law is obeyed.) c. An unknown cobalt sample was treated as follows: 40.8 mg of the unknown was dissolved in solvent to prepare 50.00 mL of solution in a volumetric flask. 4.00 mL of this solution was treated with thiocyanate, and diluted to a final volume of 50.00 mL. A sample of this final solution was placed in the same cuvette as the standards, and showed an absorbance of 0.38 at 625 nm. Determine the percentage of cobalt in the original unknown, given that the atomic mass of cobalt is 58.933 g/mol.The absorbance values observed during the determination of the complex stoichiometry with the Job method using the spectroscopic method were plotted and the following correct equations were obtained. What is the n value of the compound formed by Fe + 3 and SCN- ions? 1. Line equation: y = 2.6188x + 0.16082. Line equation: y = -2.5963x + 2.7203
- Describe main features of the evidence of M-CºC characterization and corresponding techniques of this complex (COCL(PPh3)2-III(CF3)2)...?Nickel bis-dimethylglyoximate complex was deposited with a weight of (4.869g) with the filter paper from the base medium from adding (10ml) of hot DMG to a salt of nickel chloride at weight (0.78g), find the percentage of nickel ion. Note that the weight of the filter paper (1.30g). At.Wt.: Ni= 58.69 g/mol, C= 12 g/mol, O=16 g/mol, H=1 g/mol, N=14 g/molThe 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?