Calculate the cell potential for a reaction in a electrolytic cell with the following half-reactions if:...

Calculate the cell potential for a reaction in a electrolytic cell with the following half-reactions if: [U 3+] = 0.10 M, [MnO4 - ] = 0.20M, [Mn2+], and [H+ ] = 0.20 M

U 3+ + 3e -> U o Ecell = - 1.642 V

MnO4 - + 8H+ + 5e- -> Mn2+ + 4H2O Ecell = +1.51 V

Expert Solution

U 3+ + 3e -> U o Ecell = - 1.642 V

MnO4 - + 8H+ + 5e- -> Mn2+ + 4H2O Ecell = +1.51 V

5U-----------> 5U^3+ (aq) + 15e^- Ecell = 1.642v

3MnO4 - + 24H+ + 15e- -> 3Mn2+ + 12H2O Ecell = +1.51 V

-----------------------------------------------------------------------------------------------------------------

5U + 3MnO4^- + 24H^+ -------------> 5U^3+ (aq) + 3Mn^2+ + 12H2O Ecell = 3.152V

n = 15

Ecell = E0cell - 0.0592/n logqQ

= 3.152 - 0.0592/15 log[U^3+]^5 [Mn^2+]^3/[MnO4^-]^3 [H^+]^24

= 3.152 -0.00394 log(0.1)^5(0.2)^3/(0.2)^3(0.2)^24

= 3.152 - 0.00394log(596046447753)

= 3.152-0.00394*11.7752

= 3.1056V >>>>answer

queen_honey_blossom answered 2 years ago

Write the cell reaction and electrode half-reactions and calculate the standard potential of each of the...

Write the cell reaction and electrode half-reactions and calculate the standard potential of each of the following cells: a) Zn/ZnSO4(aq)//AgNO3(aq)/Ag b) Pt/K3[Fe(CN)6](aq), K4[Fe(CN)6](aq)//CrCl3 (aq)/Cr Please show all steps and clear writing. Thanks

Use the following half-reactions to write three spontaneous reactions, and calculate E cell for each reaction:...

Use the following half-reactions to write three spontaneous reactions, and calculate E cell for each reaction: a. Au+ (aq) + e- ----> Au (s) E= 1.69 V b. N2O (g) + 2H+ (aq) + 2 e- ----> N2 (g) + H2O (l) E= 1.77 V c. Cr3+ (aq) + 3e- ---> Cr (s) E= -0.74 V

Based on the following cells, determine the (i) cell reaction, (ii) electrode half-reactions and (iii) standard potential.

Based on the following cells, determine the (i) cell reaction, (ii) electrode half-reactionsand (iii) standard potential. Then, based on the standard potential, determine if the cellcan be used as spontaneous voltaic cell or nonspontaneous electrolytic cell. (a) Pt|Ti3+(aq), Ti2+(aq)||Sn4+(aq), Sn2+(aq)|Pt(b) Mg|Mg2+(aq)||Mn2+(aq), H+ (aq)|MnO2(s)|Pt(c) Pt|F2(g)|HF(aq)||K2CrO4(aq)|Ag2CrO4(s)|Ag

Write the overall reaction and the half-cell reactions of the following cells, and clearly indicate the...

Write the overall reaction and the half-cell reactions of the following cells, and clearly indicate the anode and the cathode for each cell. c) Pb|Pb2+(0.10 M)||Cu2+(0.10 M)|Cu d) Pb|Pb2+(0.10 M)||Zn2+(0.10 M)|Zn e) Zn|Zn2+(0.10 M)||Fe2+(0.10 M)|Fe f) Pb|Pb2+(0.10 M)||Fe2+(0.10 M)|Fe

7. Given the standard reduction potential for the following two half-cell reactions (in the presence of...

7. Given the standard reduction potential for the following two half-cell reactions (in the presence of 1.00 M HCl): Fe3+ + e <==> Fe2+, E0 = + 0.68 V AsO4 - + 2H+ + 2e <==> AsO3 - + H2O, Eo = +0.559 V. Please calculate the system potential at the equivalence point when Fe3+ was used to titrate AsO3 - in the presence of 1.00 M HCl. Answer: 0.60 V

Calculate the cell potential for the galvanic cell in which the following reaction occurs at 25...

Calculate the cell potential for the galvanic cell in which the following reaction occurs at 25 °C, given that [Al3 ] = 0.00120 M and [Au3 ] = 0.787 M. Al (s) + Au^3+ (aq) <===> Al^3+ (aq) + Au (s)

Separate the following redox reactions into half-reactions, and label each half-reaction as oxidation or reduction. Part...

Separate the following redox reactions into half-reactions, and label each half-reaction as oxidation or reduction. Part A Oxidation half-reaction for 2Li(s)+2H+(aq)→2Li+(aq)+H2(g). Express your answer as a chemical equation. Identify all of the phases in your answer. SubmitMy AnswersGive Up Incorrect; Try Again; 5 attempts remaining; no points deducted Part B Reduction half-reaction for 2Li(s)+2H+(aq)→2Li+(aq)+H2(g). Express your answer as a chemical equation. Identify all of the phases in your answer. SubmitMy AnswersGive Up Part C Oxidation half-reaction for 2Ag+(aq)+Be(s)→Be2+(aq)+2Ag(s). Express your...

Question