Consider the following electrochemical cell at 298.15 K: Cd(s) | Cd(NO3)2 (aq, m = 0.200) ||...
Consider the following electrochemical cell at 298.15 K:
Cd(s) | Cd(NO3)2 (aq, m = 0.200) || KCl (aq, m = 0.0150) | Ag(s) |
AgCl(s)
A) Write the overall reaction.
B) Calculate the standard cell potential and ∆GR°.
C) Calculate the cell potential and ∆GR assuming activity coefficients are 1.00.
D) Calculate the cell potential and ∆GR using the Debye-Huckel limiting law for the mean ionic activity coefficients.
E) Is the cell reaction spontaneous as written?
F) How much electrochemical work may be obtained from the cell per gram of reactants?
G) How should the initial ionic concentrations be changed to increase the amount of electrochemical work that may be obtained from the cell?
Homework Answers
there are two many questions, each has some parts so i have solved first 4 questions.please post rest separately...thanks
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Consider the following electrochemical cell at 298.15 K:
Cd(s) | Cd(NO3)2 (aq, m = 0.200) ||...
the Answer is (A) 15. For the given electrochemical cell at 298.15 K: Pt|H2(g, f= 1...
the Answer is (A)
15. For the given electrochemical cell at 298.15 K: Pt|H2(g, f= 1 atm)|HCl(aq, m) |AgCl) |Ago) The following figure is obtained from derivation of the Nernst equation at different molalities of HCl : 0.235 y = 0.223 +0.06x 80.230 – Ecent (2RT/F) In(m/mº) 0.225 0.220 + 0.0 0.1 0.2 (m/m9) 12 (2RT) The figure shows the plot of (Ecell + F In (m/m°)) vs (m/mº)1/2 . Calculate the experimental mean activity coefficient V+ of HCl at...
8. Consider the following electrochemical cell: Cd Cd? (0.20 M) // H (0.05 M), H2 (1...
8. Consider the following electrochemical cell: Cd Cd? (0.20 M) // H (0.05 M), H2 (1 atm) /Pt Given the following standard reduction potentials: Reaction 2 H+ (aq) + 2 Cd + (aq) + 2e H2 (aq) Cd (s) Eº (volts) 0.00 -0.40 (a) Write the equation for the overall cell reaction. (b) Calculate E' for the overall reaction. (c) Calculate the equilibrium constant for the overall reaction. (d) Calculate the actual value of E for the cell at the...
Consider the following electrochemical cell. Ag(s) | Ag+(aq) || Cr3+(aq) | Cr(s) Determine the overall reaction...
Consider the following electrochemical cell. Ag(s) | Ag+(aq) || Cr3+(aq) | Cr(s) Determine the overall reaction and its standard cell potential (in V) at 25°C for this reaction. (Include states-of-matter under the given conditions in your answer. Use the lowest possible whole number coefficients.) Overall reaction (please provide)= standard cell potential V= Is the reaction spontaneous at standard conditions?
An Ag-Cd electrochemical cell is written as Cd (s) CdCl2 (0.010 M) || AgCl (s) CI-...
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Electrochemistry 1.Consider the Daniel Cell at the indicated molalities: Zn(s)|ZnSO4(aq, 0.100 M)||CuSO4(aq, 0.500 M)|Cu(s) a) Calculate...
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consider the electrochemical cell 2H^+ (aq)+ Cd(s) = Cd^2+ (aq) + H2(g) Ecell°=0.40 V what would...
consider the electrochemical cell 2H^+ (aq)+ Cd(s) = Cd^2+ (aq) + H2(g) Ecell°=0.40 V what would increase measured cell potential reducing H+ in hydrogen cell increasing the mass of the solid CD electrode reducing cd^2+ ion concentration increasing pressure of hydrogen gas in hydrogen cell none when 1.00kj(1000 j) of heat is added to 50.0 g of water how should the temp of the water change?
6. Consider the following electrochemical cell: Write electrode half-reactions and the cell reaction. Determine the standard...
6. Consider the following electrochemical cell: Write electrode half-reactions and the cell reaction. Determine the standard emf E for this cell from standard potential data in the Data Section of your textbook. Calculate the standard Gibbs energy and the equilibrium constant for the cell reaction at 25°C. Write the Nernst equation for the cell and calculate its emf E given that the pressure of H:(g) p = 1 bar, the molality of HCI(aq) b = 0.01 mol kg.. and the...
Consider an electrochemical cell consisting of an Fe(s) electrode, Fe(NO3)2 electrolyte connected through a salt bridge...
Consider an electrochemical cell consisting of an Fe(s) electrode, Fe(NO3)2 electrolyte connected through a salt bridge to a Ag wire coated in AgCl(s) immersed in an aqueous KCl solution. Is the standard cell and balanced galvanic cell reaction: (If needed, refer to Table 17-1.) 0.669 V, Fe(s) + AgCl(s) → Fe2+(aq)+ Ag(s) + Cl-(aq) 0.669 V, Fe(s) + 2AgCl(s) → Fe2+(aq)+ 2Ag(s) + 2Cl-(aq) –0.225 V, Fe(s) + 2AgCl(s) → Fe2+(aq)+ 2Ag(s) + 2Cl-(aq) 0.259 V, Fe(s)+ 3AgCl(s) → Fe3+(aq)+...
Consider an electrochemical cell consisting of an Fe(s) electrode, Fe(NO3)2 electrolyte connected through a salt bridge...
Consider an electrochemical cell consisting of an Fe(s) electrode, Fe(NO3)2 electrolyte connected through a salt bridge to a Ag wire coated in AgCl(s) immersed in an aqueous KCl solution. Is the standard cell and balanced galvanic cell reaction: (If needed, refer to Table 17-1.) 0.669 V, Fe(s) + 2AgCl(s) → Fe2+(aq) + 2Ag(s) + 2Cl-(aq) –0.669 V, Fe(s) + 2AgCl(s) → Fe2+(aq) + 3Ag(s) + 3Cl-(aq) –0.225 V, Fe(s) + 2AgCl(s) → Fe2+(aq) + 2Ag(s) + 2Cl-(aq) 0.669 V, Fe(s)...
Calculate ∆G° (kJ/mol) for the following electrochemical cell: Cd(s) | Cd2+(aq) || Ni2+(aq)| Ni(s)
Calculate ∆G° (kJ/mol) for the following electrochemical cell: Cd(s) | Cd2+(aq) || Ni2+(aq)| Ni(s)
the Answer is (A)
15. For the given electrochemical cell at 298.15 K: Pt|H2(g, f= 1 atm)|HCl(aq, m) |AgCl) |Ago) The following figure is obtained from derivation of the Nernst equation at different molalities of HCl : 0.235 y = 0.223 +0.06x 80.230 – Ecent (2RT/F) In(m/mº) 0.225 0.220 + 0.0 0.1 0.2 (m/m9) 12 (2RT) The figure shows the plot of (Ecell + F In (m/m°)) vs (m/mº)1/2 . Calculate the experimental mean activity coefficient V+ of HCl at...
8. Consider the following electrochemical cell: Cd Cd? (0.20 M) // H (0.05 M), H2 (1 atm) /Pt Given the following standard reduction potentials: Reaction 2 H+ (aq) + 2 Cd + (aq) + 2e H2 (aq) Cd (s) Eº (volts) 0.00 -0.40 (a) Write the equation for the overall cell reaction. (b) Calculate E' for the overall reaction. (c) Calculate the equilibrium constant for the overall reaction. (d) Calculate the actual value of E for the cell at the...
An Ag-Cd electrochemical cell is written as Cd (s) CdCl2 (0.010 M) || AgCl (s) CI- (0.50 M) | Ag E°Cd2+/Ca = 0.403 V and EºACIJAg = 0.222 V 1. Write the half-cell reactions at anode and at cathode. 2. Which is oxidant and which is reductant? 3. Calculate the half-cell potentials at both anode and cathode. 4. Calculate the cell potential. 5. Write the whole-cell reaction. 6. Calculate the equilibrium constant for the whole-cell reaction. For the half –...
6. Consider the following electrochemical cell: Write electrode half-reactions and the cell reaction. Determine the standard emf E for this cell from standard potential data in the Data Section of your textbook. Calculate the standard Gibbs energy and the equilibrium constant for the cell reaction at 25°C. Write the Nernst equation for the cell and calculate its emf E given that the pressure of H:(g) p = 1 bar, the molality of HCI(aq) b = 0.01 mol kg.. and the...
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