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7. What are the names of the elements that we can not analyse with AAS but we can use ICP-OES for quantitative analysis.
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- Name the following compounds A and B. How could you distinguish these two molecules by using 1H NMR and IR techniques? Propose an analytical technique to determine the iron content of these compounds. Calculate the mass percentages of C and H of compound B (C: 12.01 g/mol; H: 1.008 g/mol; Fe: 55.845 g/mol).How is lead ion separated and identified in group 1 cation analysis?How does the hydride generation method of sample introduction improve thesensitivity of some elements?
- Briefly explain how AAS can quantify the amount of lead in sample solution?A 1.000-g sample containing bromide was dissolved in sufficient water to give 100.0 mL. A 50.00 mL aliquot was measured and after acidification, silver nitrate was introduced to precipitate AgBr, which was filtered, washed, and then dissolved in an ammoniacal solution of potassium tetracyanonickelate(II): Ni(CN)42- + 2AgBr(s) → 2Ag(CN)2- + Ni2+ + 2Br-50.00 mL remaining solution was analyzed for its Br- content by potentiometry using a metallic electrode of the second kind. a) Write the cell notation of the potentiometric set-up with SCE as the reference electrode. b) Write the Nernst equation that describes the indicator electrode set-up. Ecell recorded in running the solution using the potentiometric set-up was Ecell = 0.0286 V. (E0Ag/AgBr = 0.095 V) c) Compute for Eind. d) Compute pBr in the 50.00 mL aliquot. e) Compute for % NaBr ( in the potentiometric technique).In order to analyse mercury with AAS, which method will you prefer? Explain this method in detail.
- Halogens in medicines are determined by appropriate methods (Give the answer in the form A2, B5, and so on): A) Bilitrast 1) With silver nitrate after heating with alkali B) Iodoform 2) With silver nitrate when heated C) Sodium bromide 3) Incineration in a flask with oxygen D) Bromizoval 4) With silver nitrate E) Sodium iodide 5) With sodium hydroxideWrite a detail note on fol soft ionization techniques:- a. Field Desorption (FD) b. Fast Atom Bombardment (FAB) c. Desorption Chemical Ionization (DCI)In order to analyse mercury with AAS, which method will you prefer?
- The nitrite in a series of standard solutions (mg/L, n = 5) are converted to azo dye and the slope of the calibration curve is 2.0 ppm1. A 10.00-mL mineral water sample is treated in the same way as standards and diluted to a final volume of 100.00-mL. It gives an absorbance of 0.80. The absorbance of blank solution under the same conditions is 0.10. Calculate ppm (mg/L) of NO2 (46 g/mol) and the molarity of NANO2 (69 g/mol) in the original sampleOutline the two essential steps needed to prepare a 0.025mol dm-3 solution of sodium oxalatewhat is the purpose and what is it for Spectrophotometric of a Cobalt Chloride Solution Analysis?