Three bottles of aqueous solutions are discovered in an aban-doned lab. The solutions are green, yellow, and purple. It isknown that three complex ions of chromium(III) were commonlyused in that lab: [Cr(H,O),J*, [Cr(NH,)*, and[Cr(H,0),Cl]*. Determine the likely identity of each of the col-ored solutions.

To Find: To determine the likely identity of each of the colored solutions of the three complex ions…

Answered: Three bottles of aqueous solutions are…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter20: Chemistry Of Selected Transition Elements And Coordination Compounds

Section: Chapter Questions

Problem 73QRT

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Similar questions

a. In the absorption spectrum of the complex ion Cr(NCS)63, there is a band corresponding to the absorption of a photon of light with an energy of 1.75 104 cm-1. Given 1 cm1 = 1.986 1023 J, what is the wavelength of this photon? b. The CrNC bond angle in Cr(NCS)63 is predicted to be 180. What is the hybridization of the N atom in the Ncs- ligand when a Lewis acid-base reaction occurs between Cr3+ and NCs- that would give a 180 CrNC bond angle? Cr(NCS)63 undergoes substitution by ethylenediamine (en) according to the equation Cr(NCS)63+2enCr(NCS)2(en)2++4NCS Does Cr(NCS)2(en)2+ exhibit geometric isomerism? Does Cr(NCS)2(en)2+ exhibit optical isomerism?
Two different compounds are known with the formula Pd(py)2Cl2, but there is only one compound with the formula Zn(py)2Cl2. The symbol py is for pyridine, a mono-dentate ligand. Explain the differences in the Pd and Zncompounds.
Experiments show that K4[Cr(CN)6] is paramagnetic and has two unpaired electrons. The related complex K4[Cr(SCN)6] is paramagnetic and has four unpaired electrons. Account for the magnetism of each compound using the ligand field model. Predict where the SCN ion occurs in the spectro-chemical series relative to CN.
Would you expect salts of the gold(I) ion, Au+, to be colored? Explain.
Which of the following statement(s) is( are) true? a. The coordination number of a metal ion in an octahedral complex ion is 8. b. All tetrahedral complex ions are low-spin. c. The formula for triaquatrianuninechromiwn(III) sulfate is [Cr(H2O)3(NH3)](SO4)3. d. The electron configuration of Hf2+ is [Xe]4f126s2. e. Hemoglobin contains Fe3+.
A complex, ML62+, is violet. The same metal forms a complex with another ligand, Q, that creates a weaker field. What color might MQ62+ be expected to show? Explain.
Assign oxidation states to the transition-metal ions in the following compounds: TiO2, ZrCl4, VCl3, CrF6, Mo2S3, FeO, AuCl3. Explain, where appropriate, which ligands stabilize the higher oxidation states and why.
Explain the differences between weak-field and strong-field metal complexes?
Aqueous solutions of [Mn(H2O)6]2+ are faint pink, so much so that they appear to be colorless, which is in contrast to other coordination complexes that we have seen to this point in the course. a) Please explain why this solution is colorless. b) If the water ligands were changed to bipyridine (bpy) ligands and you had [Mn(bpy)3]2+, would the solution still be colorless? What changes, if any, would you expect to see in the visible spectrum? If the complex would be expected to have absorptions, please note now many.
There are two geometric isomers of octahedral complexes of the type MA3X3 (Figure 1), where M is a metal and A and X are monodentate ligands. Of the complexes shown here, which are identical to (1) and which are the geometric isomers of (1)?

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