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Chapter 17: Q15P (page 428)
What does a mediator do?
Between the analyte and the electrode, the mediator transfers electrons.
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Peak current and scan rate (v) are listed for cyclic voltammetry of the reversible reaction Fe( II ) Fe(III ) of a water-soluble ferrocene derivative in 0.1MNaCLIf a graph of versusgives a straight line, then the reaction is diffusion controlled. Prepare such a graph and use it to find the diffusion coefficient of the reactant from Equation17 - 21for this one-electron oxidation. The area of the working electrode is, and the concentration of reactant is 1.00mM.
Cathodic stripping of in Figure 17-26does not involve oxidation or reduction of. Explain how this measurement works.
(a) At what cathode potential will Sb(s)deposition commence from solution at pH 0.00? Express this potential versus S.H.E. and versus. (Disregard overpotential, about which you have no information.)
(b) What percentage ofcould be reduced electrolytically to Cu(s)beforein the same solution begins to be reduced at pH 0.00?
A monolayer (single layer of atoms) of Cuon the (100) crystal face shown in the margin hasatoms. What current can deposit one layer of Cuatoms onin 1 s?
The standard free energy change for the formation of from is The reactions are
Calculate the standard voltageneeded to decompose water into its elements by electrolysis. What does the word standard mean in this question?
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