A magnesium bar with a mass of 6.5 kg is attached to a buried iron pipe to serve as a sacrificial anode. An average current of 0.018 A flows between the bar and the pipe.a. What half-reaction takes place at the surface of the magnesium bar?(Use the lowest possible coefficients. Be sure to specify states such as (ag) or (s). If a box is not needed, leave it blank.)b. What half-reaction takes place at the surface of the iron pipe? There is some oxygen around the iron pipe.(Use the lowest possible coefficients. Be sure to specify states such as (ag) or (s). If a box is not needed, leave it blank.)c. In which direction do electrons flow between the two surfaces?O from the iron pipe to the magnesium barO from the magnesium bar to the iron piped. How many years would it take for the entire magnesium bar to be consumed?years Standard Reduction (Electrode) Potentials at 25 °CStandard Reduction (Electrode) Potentials at 25 °CHalf-ell ReactionE (volts)Half-Cell Reaction(volts)Cr"(aq) + 3 e Cr[s)Za"(aq) + 2 e-Zn[s)-0.74F2(8) + 2 e2 F'(aq)2.87-0.763Ce* (aq) + e' Ce³*(aq)Mno, (aq) + 8 H"(aq) + 5 e Mn²"(aq) + 4 H,0(1)1.612 H,0() + 2 e-Hz(R) + 2 OH (aq)-0.831.51Mn2"(aq) + 2 e- Mn(s)-1.18Cl2(8) + 2 e 2 cI(aq)1.36A"(aq) + 3 e→Al(s)-1.66Cr20, (aq) + 14 H'(aq) + 6 e' →2 Cr*"(aq) + 7 H20(1)1.33Mg2"(aq) + 2 e- Mg(s)-2.3702(8) + 4 H"(aq) + 4 e2 H20(1)1.229Na"(aq) + e Na(s)-2.714Brz(1) + 2 e 2 Br'(aq)K"(aq) +e K(s)-2.9251.08NO, (aq) + 4 H"(aq) + 3 e NO(g) + 2 H,0)Li (aq) + eLi(s)-3.0450.962 Hg2 (aq) + 2 e - Hg,"(aq)0.920Hg"(aq) + 2 e- Hg(1)0.855Ag"(aq) + e Ag(s)0.799Hg,"(aq) + 2 e–2 Hg()0.789Fe"(aq) + eFe²"(aq)0.77112(8) + 2 e2 I(aq)0.535Fe(CN), (aq) + e' Fe(CN),*(aq)0.48Cu2 (aq) + 2 e →Cu(s)0.337Cu"(aq) + e Cu"(aq)0.153S(s) + 2 H"(aq) + 2 e H,S(aq)0.142 H"(aq) + 2 e- H2(8)0.0000Ph (aq) + 2 e' Ph(s)-0.126Sn2*(aq) + 2 e- Sn(s)-0.14Ni"(aq) + 2 e NI(s)-0.25Co2 (aq) + 2 e- Co(s)-0.28Ca*(aq) + 2 e-Cd(s)-0.403Cr"(aq) + e Cr²*(aq)-0.41Fe"(aq) + 2 e Fe(s)-0.44

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a. What half-reaction takes place at the surface of the magnesium bar? (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) b. What half-reaction takes place at the surface of the iron pipe? There is some oxygen around the iron pipe. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) + c. In which direction do electrons flow between the two surfaces?

a. What half-reaction takes place at the surface of the magnesium bar? (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) b. What half-reaction takes place at the surface of the iron pipe? There is some oxygen around the iron pipe. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) + c. In which direction do electrons flow between the two surfaces?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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