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Inorganic Chemistry. This is about reduction potential with d-transition metals




Inorganic Chemistry.;This is about reduction potential with d-transition metals;Please, help me.;Attachment Preview;Chem 103- problem set 1.docx Download Attachment;Chemistry 103;Fall Semester 2014;Problem Set 1;Due Tuesday, 16 September at 9:40 am (start of class);1. The standard reduction potential, E1/2, for M2+ + 2e-;M(s) for Pb(s) in water;is - 0.13 V but + 0.28 V in ammonia, relative to the hydrogen electrode potential;H+ + 1e- H2.;a. Do you expect Pb(s) to dissolve in acidic water or ammonia? Explain your;answer.;b. What are the elementary reactions that are involved in these two;reactions and how do they depend on the solvent?;2. The net reduction of Cu2+ by Cu(s), eq 1, Cu2+ + Cu;2Cu+ can be factored;into oxidative and reductive half reactions. The reduction potential for each halfreaction in water are given in eqs 2 and 3.;Cu+ + 1eCu2+ + 1e-;Cu(s), E1/2 = + 0.52 V (2);Cu+, E1/2 = + 0.16 V (3);The reduction potentials for each half-reaction in ammonia are + 0.36 V and +;0.44 V for eq 2 and 3, respectively.;a.;b.;c.;d.;Calculate E and G for the reaction in eq 1 in water.;Calculate E and G for the reaction in eq 1 in ammonia.;If you wanted a solution of Cu+, what solvent would you use? Why?;How do you rationalize the solvent dependence?;3. The ions, Mn2+ (aq) and Fe3+ (aq), are isoelectronic, that is they have the same;number of d electrons. The reduction potentials for these ions is given in eq 1;and 2.;Mn3+ (aq) + 1eFe (aq) + 1e-;Mn2+ (aq) E1/2 = +1.60 V;Fe2+ (aq) E1/2 = +0.77 V;a. If you mixed these two ions in equimolar amounts in water would a net;chemical reaction occur?;b. Calculate the value of E and G for the net reaction.;c. What factors influence the net electron exchange reaction?;4. Californium, Cf, is a man-made element whose reduction potentials have been;measured.;Cf4+ (aq) + 1eCf3+ (aq) + 1e-;Cf3+ (aq) E1/2 = + 3.20 V;Cf2+ (aq) E1/2 = - 1.60 V;a. Which ion is more thermodynamically stable?;b. Explain your reasoning to part (a).;c. Would you expect Cf4+ (aq) to be stable in water?;d. Explain your reasoning in part (c).


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