3. The following complexes are charged. Give possible cou neutral coordination compound. Include the name and charge of the counter ions, as well as how many (stoichiometry) of them are needed. a. Mn(II)(EDTA) b. Pt(IV)(OH2),Cl, c. Cr(III)(ox); d. Di-u-chloro-bis(diammineplatinum(II)) sed to isolaté the

3. The following complexes are charged. Give possible cou neutral coordination compound. Include the name and charge of the counter ions, as well as how many (stoichiometry) of them are needed. a. Mn(II)(EDTA) b. Pt(IV)(OH2),Cl, c. Cr(III)(ox); d. Di-u-chloro-bis(diammineplatinum(II)) sed to isolaté the

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter9: Complexometric And Precipitation Titrations

Section: Chapter Questions

Problem 1P

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A 3.03-g petroleum specimen was decomposed by wet ashing and subsequently diluted to 500 mL in a volumetric flask. Cobalt was determined by treating 25.00-mL aliquots of this diluted solution as follows: Assume that the Co(II)-ligand chelate obeys Beer’s law, and calculate the percentage of cobalt in the original sample.
Sketch structure of Mo(DMe) Cl2 (NMe,)2 , thhen apply ean to this complex showing ligand analysis and oxidation state analysis
(a) A compound with formula RuCl3 . 5 H2O is dissolved inwater, forming a solution that is approximately the samecolor as the solid. Immediately after forming the solution,the addition of excess AgNO3(aq) forms 2 mol of solid AgClper mole of complex. Write the formula for the compound,showing which ligands are likely to be present in the coordinationsphere. (b) After a solution of RuCl3 . 5 H2O hasstood for about a year, addition of AgNO3(aq) precipitates 3mol of AgCl per mole of complex. What has happened inthe ensuing time?
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Explain the difference between double salt and metal complexes with examples?
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Many transition metal complexes are said to follow the “18-electron rule,” meaning they form particularly stable complexes when the metal + ligand electrons contributing to the MOs add up to a total of 18 electrons. a. Use the full MO diagram for an octahedral metal complex with pi-acidic ligands we derived in class to justify why 18-electrons might be particularly stable. b. Use the 18-electron rule to predict which 1st row transition metal would be most likely to form an octahedral M(CO)6 (Note: there is no charge; the metal retains all its electrons.) c. Qualitatively, how would you expect the CO bond to change when it forms this complex? Would it be stronger, weaker, or the same compared to free CO? (Hint: think about what a ? −???? means and what the orbital does from the perspective of the M–CO interaction as well as the C– O interaction).
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Explain why the tetrahedral complexes A and B have magnetic moments of 1.89 and 0.0 BM respectively. Comment on the observations.