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Given the following reactions: Anode: NO3- + 2H+ + e- --> NO2 + H2O Cathode: 2H+ + 2e- --> H2 2NO2(g) + 2 H2O (I) --> 2NO3-(aq) + 2H+(aq) + Redox: H2(g) Conditions: [0.15 atm] [0.18 atm] [0.1 M] [0.67 atm] Find the pH, if E = - 0.70 V. %3D

Given the following reactions: Anode: NO3- + 2H+ + e- --> NO2 + H2O Cathode: 2H+ + 2e- --> H2 2NO2(g) + 2 H2O (I) --> 2NO3-(aq) + 2H+(aq) + Redox: H2(g) Conditions: [0.15 atm] [0.18 atm] [0.1 M] [0.67 atm] Find the pH, if E = - 0.70 V. %3D

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter16: Spontaneity Of Reaction
Section: Chapter Questions
Problem 72QAP: Given the following standard free energies at 25°C for the following reactions:...
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Given the following reactions: Anode: NO3- + 2H+ + e- --> NO2 + H2O Cathode: 2H+ + 2e- --> H2 2NO2(g) + 2 H2O (1) --> 2NO3-(aq) + 2H+(aq) + Redox: H2(g) Conditions: [0.15 atm] [0.18 atm] [0.1 M] [0.67 atm] Find the pH, if E = - 0.70 V.
Transcribed Image Text:Given the following reactions: Anode: NO3- + 2H+ + e- --> NO2 + H2O Cathode: 2H+ + 2e- --> H2 2NO2(g) + 2 H2O (1) --> 2NO3-(aq) + 2H+(aq) + Redox: H2(g) Conditions: [0.15 atm] [0.18 atm] [0.1 M] [0.67 atm] Find the pH, if E = - 0.70 V.
Find the pH, if E = - 0.70 V. Table 7.2 Standard potentialsat 298 K. (a) In clectrochemical order Reduction half raction Reduction half-reaction EIV Cu"+eCu Se+ 2 Se Agie +e Ag+ Br Strongly oxidizing +0.16 HXeO, + 2H + 2e → XeO, + 3H,0 +30 +0.15 2.87 +0.07 0,+ 2H + 0,+H,0 S,0 +2e +2S0 +207 0.00 2H"+ H, by definition +2.05 1.98 -0.04 0.06 H,0, + 2H+ 2- 21,0 +1.78 In' ln Se+e Sn Au" +e Au +1.69 -0.14 Pb + 2e P 1.67 0.14 ZHCIO + 2H + 2e-a,+21,0 Agl g+r N+2eNi +1.63 -0.15 +161 023 2BrO+2r + 2e , + 21,0 Co+2e Ce In+*In +1.60 Mn0; + H" + S+Me" + 4H,0 Mn" +eMn +1.51 -0.34 +1.51 -034 Au+ Au +1.40 PASO,+ 2b+ so +1.36 -0.37 Cr0 + 14H +6e →20" +7H,0 0,+H0++0, + 20H 0,+ 4H* + 4 2H,0 1.33 -.40 +1.24 Im ln --0.40 1.23 1.23 Fe+ e -0.44 Mno,+4+ 2 Ma" + 2H,0 +1.23 In+ In -0.44 +1.09 -0.48 +0.97 In +eIn" -49 NO, ++ NO+ 21,0 2Hg" + 2 g CIo +H,0+2 -d+20 Hig +2e -Hg NO, +2H +- NO, +HO 0.6 061 0.92 -074 Za + Zn -0.76 +0.6 CatOH), + 2Cd+ 20H 21,0+ 2e1, +20r C+2 Cr Mn+2e Mn +0.80 +0.80 -091 Hg + 22g +0.79 -LIE +0.77 -L19 BrO + H,0+ 2r+ir + 20H FigS0, + 2e+2ig+ so Mno + 211,0+ 2 Meo, + 4O Mno, +e Mno 1+ 21 +0.76 -163 062 A Al -1.66 U+e U 1.79 +0.56 S+eSc -209 Mg+ 2Mg Ce+ Ce +0.54 -236 +0.52 -2.48 L la Na +e Na +0.53 -252 NICOH + H0e Ni(OH), + OH AgCro, + 2e2Ag+ Co 0,+2H,0+e4OH do, +H0+2 ao, + 20H 0.49 -271 +0.45 C +2Ca -287 40.40 -289 +0.36 -2.91 0.36 Ra+2 Ra -2.92 C+ 2eCu +034 -2.92 Hga, + 2+2Hg+2 40.27 Rb +eRb -2.93 40.22 2.93 +0.20 -305
Transcribed Image Text:Find the pH, if E = - 0.70 V. Table 7.2 Standard potentialsat 298 K. (a) In clectrochemical order Reduction half raction Reduction half-reaction EIV Cu"+eCu Se+ 2 Se Agie +e Ag+ Br Strongly oxidizing +0.16 HXeO, + 2H + 2e → XeO, + 3H,0 +30 +0.15 2.87 +0.07 0,+ 2H + 0,+H,0 S,0 +2e +2S0 +207 0.00 2H"+ H, by definition +2.05 1.98 -0.04 0.06 H,0, + 2H+ 2- 21,0 +1.78 In' ln Se+e Sn Au" +e Au +1.69 -0.14 Pb + 2e P 1.67 0.14 ZHCIO + 2H + 2e-a,+21,0 Agl g+r N+2eNi +1.63 -0.15 +161 023 2BrO+2r + 2e , + 21,0 Co+2e Ce In+*In +1.60 Mn0; + H" + S+Me" + 4H,0 Mn" +eMn +1.51 -0.34 +1.51 -034 Au+ Au +1.40 PASO,+ 2b+ so +1.36 -0.37 Cr0 + 14H +6e →20" +7H,0 0,+H0++0, + 20H 0,+ 4H* + 4 2H,0 1.33 -.40 +1.24 Im ln --0.40 1.23 1.23 Fe+ e -0.44 Mno,+4+ 2 Ma" + 2H,0 +1.23 In+ In -0.44 +1.09 -0.48 +0.97 In +eIn" -49 NO, ++ NO+ 21,0 2Hg" + 2 g CIo +H,0+2 -d+20 Hig +2e -Hg NO, +2H +- NO, +HO 0.6 061 0.92 -074 Za + Zn -0.76 +0.6 CatOH), + 2Cd+ 20H 21,0+ 2e1, +20r C+2 Cr Mn+2e Mn +0.80 +0.80 -091 Hg + 22g +0.79 -LIE +0.77 -L19 BrO + H,0+ 2r+ir + 20H FigS0, + 2e+2ig+ so Mno + 211,0+ 2 Meo, + 4O Mno, +e Mno 1+ 21 +0.76 -163 062 A Al -1.66 U+e U 1.79 +0.56 S+eSc -209 Mg+ 2Mg Ce+ Ce +0.54 -236 +0.52 -2.48 L la Na +e Na +0.53 -252 NICOH + H0e Ni(OH), + OH AgCro, + 2e2Ag+ Co 0,+2H,0+e4OH do, +H0+2 ao, + 20H 0.49 -271 +0.45 C +2Ca -287 40.40 -289 +0.36 -2.91 0.36 Ra+2 Ra -2.92 C+ 2eCu +034 -2.92 Hga, + 2+2Hg+2 40.27 Rb +eRb -2.93 40.22 2.93 +0.20 -305
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