Consider the following analytical cell: Pt(s)|H2(g,0.10atm)|NaOH(aq,0.10M)||NaOH(aq,0.0010M)|Ag2O|Ag(s) a. If we assumed that all the reactants were under...
Consider the following analytical cell: Pt(s)|H2(g,0.10atm)|NaOH(aq,0.10M)||NaOH(aq,0.0010M)|Ag2O|Ag(s) a. If we assumed that all the reactants were under standard conditions, what is E°cell? b. What is Ecathode under the given conditions? c. What is Eanode under the given conditions? d. What is Ecell under the given conditions?
Homework Answers
Pt(s)|H2(g,0.10atm)|NaOH(aq,0.10M)||NaOH(aq,0.0010M)|Ag2O|Ag(s)
the anodic reaction involves oxidation
H2(g) + 2OH-(aq) --->2H2O(l) + 2e- E0anode = -0.83V
The cathodic reaction involves reduction
Ag2O(s) + H2O(l) + 2e --> 2Ag(s) + 2OH- E0cathode = +0.342V
E0cell = E0cathode - E0anode = 0.342 - (-0.83) = +1.172V
(b) Eanode = E0anode - 0.0592/2 log [OH-]^2 = -0.83 - 0.0296 (-6) = -0.6524V
(c) Ecathode = E0cathode - 0.0592/2 log (OH-)^2 = +0.342 +0.0592 = 0.4012 V
(d) Ecell = Ecathode - Eanode = 0.4012 - (-0.6524) = 1.0536 V
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Consider the following analytical cell:
Pt(s)|H2(g,0.10atm)|NaOH(aq,0.10M)||NaOH(aq,0.0010M)|Ag2O|Ag(s) a.
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