Homework Answers
the most possitive value of E° will be REDUCED, since it has a higher potential to do so
the least E° value will be OXIDIZED
so
V3+ + e- = V+2 must be inverted, since it will NOT reduce
so:
PtCl62- + 2e- --> PtCl42- + 2Cl-
V2+ = V3+ + e-
balance electrons
PtCl62- + 2e- --> PtCl42- + 2Cl-
2V2+ = 2V3+ + 2e-
add all
PtCl62- + 2V2+ --> PtCl42- + 2Cl- + 2V3+
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From the standard potentials of the following half-reactions, determine the reaction that will occur, and calculate...
A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential MnO2...
A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential MnO2 (s) + 4H+ (aq) +2e−→ Mn+2 ( aq) +2H2O(l) =E0red+1.23V Cl2 (g) +2e−→ 2Cl− (aq) =E0red+1.359V Answer the following questions about this cell Write a balanced equation for the half-reaction that happens at the cathode. Write a balanced equation for the half-reaction that happens at the anode. Write a balanced equation for the overall reaction that powers the cell. Be sure the reaction is spontaneous as...
The standard reduction potentials of the following half-reactions are given in Appendix E in the textbook:...
The standard reduction potentials of the following half-reactions are given in Appendix E in the textbook: Ag+(aq)+e−→Ag(s)= .799 Cu2+(aq)+2e−→Cu(s)= .337 Ni2+(aq)+2e−→Ni(s)= -.28 Cr3+(aq)+3e−→Cr(s). = -.74 1. Determine which combination of these half-cell reactions leads to the cell reaction with the largest positive cell emf. 1st and 2nd, 1st and 3rd, 1st and 4th, 2nd and 3rd, 3rd and 4th. It isn't the first or last one because I have gotten it wrong twice. 2. Calculate the value of this emf....
The following two half-reactions are found in a table of standard reduction potentials: Half-Reaction E cytochrome...
The following two half-reactions are found in a table of standard reduction potentials: Half-Reaction E cytochrome c1(Fe3+) +e- → cytochrome c1 (Fe2+) 0.22 V lipoic acid + 2 H+ + 2 e- → dihydrolipoic acid -0.29 V + What is value of Eº for the reaction that will occur involving these two half-reactions that will be spontaneous under standard conditions? 0 0.73 V 0 0.07 V O 0.51 V -0.07 V
Write the half reactions and overall reaction for each cell with calculated overall potentials as shown...
Write the half reactions and overall reaction for each cell with calculated overall potentials as shown in Table 5-1. (Note: for the iron solutions the Nernst equation must be used) Pb(s) | Pb(NO3)2 (0.1M) || Cu(NO3)2 (0.1M) Cu(s) Zn(s) | Zn(NO3)2(0.1M) || Cu(NO3)2 (0.1M) Cu(s) Cds) | Ca(NO3)2 (0.1M) || Cu(NO3)2 (0.1M) | Cu(s) Cu() Cu(NO3)2(0.1M) Il Fe (0.1M/Fe? (0.1M graphite Pb(s) Pb(NO3)2(0.1M) Il Fe3(aq) (0.1M)/ Fe2(aq) (0.1MI graphite(s) Zns | Zn(NO3)2 (0.1M) || Pb(NO3)2 (0.1M) | Pb(s) Cdis Ca(NO3)2...
Given the following standard reduction potentials: H^+ (aq) + 2e^- rightarrow H_2(g) E degree = 0.00...
Given the following standard reduction potentials: H^+ (aq) + 2e^- rightarrow H_2(g) E degree = 0.00 V Fe^3+ (aq) + 2e^- rightarrow Fe(s) E degree = -0.43 V (a) What is the cell potential by combining the above two half-reactions to make a working voltaic cell (same as galvanic cell)? (b) Which species will be oxidized in anode? Write the half-reaction for the anode. (c) Write the overall reaction and balance the chemical equation for this working voltaic cell. (d)...
Calculate the equilibrium constant for each of the reactions at 25 ∘C. Standard Electrode Potentials at...
Calculate the equilibrium constant for each of the reactions at 25 ∘C. Standard Electrode Potentials at 25 ∘C Reduction Half-Reaction E∘(V) Pb2+(aq)+2e− →Pb(s) -0.13 Zn2+(aq)+2e− →Zn(s) -0.76 Br2(l)+2e− →2Br−(aq) 1.09 Cl2(g)+2e− →2Cl−(aq) 1.36 MnO2(s)+4H+(aq)+2e− →Mn2+(aq)+2H2O(l) 1.21 Pb2+(aq)+2e− →Pb(s) -0.13 Br2(l)+2Cl−(aq)→2Br−(aq)+Cl2(g) Express your answer using two significant figures.
13. Find the standard reduction potentials for the following half-reactions: So+4H" + 2e-> HSO H2O and...
13. Find the standard reduction potentials for the following half-reactions: So+4H" + 2e-> HSO H2O and Ag" + e- > Ag a) Write the balanced overall reaction for a successful cell made from these two couples. b) Write the line notation for the cell. c) What is Eo for the cell? d) What is the equilibrium constant for the cell reaction at 250C? e) Calculate the ratio of activities of produces and reactants, Q, that will produce a cell voltage...
Use the standard half-cell potentials listed below to calculate the standard free energy(K]for the following reaction...
Use the standard half-cell potentials listed below to calculate the standard free energy(K]for the following reaction occurring in an electrochemical cell at 25°C. Pb 2+ (aq) +2e--- Pb(s) E* - -0.13 Volt A13+ (aq) + 3 e-Al(s) E* =-1.66 volt a. 1.53 b. - 886 c-434 d. - 443 e. -1036 What is the standard free energy Gº) in Kilojoules for the reaction below at 298 Kelvin: Farady's constant = 96,485 joules/V. mole e Zn2+ (aq) + 2e ......> Zn(s)...
Write the half-reactions as they occur at each electrode and the net cell reaction for this...
Write the half-reactions as they occur at each electrode and the net cell reaction for this electrochemical cell containing indium and cadmium: ln(s)|ln^3+ (aq)||Cd^2+ (aq)|Cd(s) anode: Ln rightarrow Ln^3+ + 3e^- cathode: Cd^2+ + 2e^- rightarrow Cd net cell reaction: 2ln + 3ed^2+ rightarrow 3ed + 2ln^3+
24) Use the standard half-cell potentials listed below to calculate the standard cell potential for the...
24) Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C. (The equation is balanced.) 26). 3 Cl2(8) +2 Fe(s) - 6 Cl(aq) + 2 Fe3+ (aq) 12(8)+2 e 2Cl(aq) E° 1.36 V 3C1tbe ! Fe3+(aq) + 3 e → Fe(s) 80036V 2Fe > 25€ Ep 3 + the A) 240 V B) 4.16V ) -1.32 V D) -1.40 V E) 1.32 V
The following two half-reactions are found in a table of standard reduction potentials: Half-Reaction E cytochrome c1(Fe3+) +e- → cytochrome c1 (Fe2+) 0.22 V lipoic acid + 2 H+ + 2 e- → dihydrolipoic acid -0.29 V + What is value of Eº for the reaction that will occur involving these two half-reactions that will be spontaneous under standard conditions? 0 0.73 V 0 0.07 V O 0.51 V -0.07 V
Write the half reactions and overall reaction for each cell with calculated overall potentials as shown in Table 5-1. (Note: for the iron solutions the Nernst equation must be used) Pb(s) | Pb(NO3)2 (0.1M) || Cu(NO3)2 (0.1M) Cu(s) Zn(s) | Zn(NO3)2(0.1M) || Cu(NO3)2 (0.1M) Cu(s) Cds) | Ca(NO3)2 (0.1M) || Cu(NO3)2 (0.1M) | Cu(s) Cu() Cu(NO3)2(0.1M) Il Fe (0.1M/Fe? (0.1M graphite Pb(s) Pb(NO3)2(0.1M) Il Fe3(aq) (0.1M)/ Fe2(aq) (0.1MI graphite(s) Zns | Zn(NO3)2 (0.1M) || Pb(NO3)2 (0.1M) | Pb(s) Cdis Ca(NO3)2...
Given the following standard reduction potentials: H^+ (aq) + 2e^- rightarrow H_2(g) E degree = 0.00 V Fe^3+ (aq) + 2e^- rightarrow Fe(s) E degree = -0.43 V (a) What is the cell potential by combining the above two half-reactions to make a working voltaic cell (same as galvanic cell)? (b) Which species will be oxidized in anode? Write the half-reaction for the anode. (c) Write the overall reaction and balance the chemical equation for this working voltaic cell. (d)...
13. Find the standard reduction potentials for the following half-reactions: So+4H" + 2e-> HSO H2O and Ag" + e- > Ag a) Write the balanced overall reaction for a successful cell made from these two couples. b) Write the line notation for the cell. c) What is Eo for the cell? d) What is the equilibrium constant for the cell reaction at 250C? e) Calculate the ratio of activities of produces and reactants, Q, that will produce a cell voltage...
Use the standard half-cell potentials listed below to calculate the standard free energy(K]for the following reaction occurring in an electrochemical cell at 25°C. Pb 2+ (aq) +2e--- Pb(s) E* - -0.13 Volt A13+ (aq) + 3 e-Al(s) E* =-1.66 volt a. 1.53 b. - 886 c-434 d. - 443 e. -1036 What is the standard free energy Gº) in Kilojoules for the reaction below at 298 Kelvin: Farady's constant = 96,485 joules/V. mole e Zn2+ (aq) + 2e ......> Zn(s)...
Write the half-reactions as they occur at each electrode and the net cell reaction for this electrochemical cell containing indium and cadmium: ln(s)|ln^3+ (aq)||Cd^2+ (aq)|Cd(s) anode: Ln rightarrow Ln^3+ + 3e^- cathode: Cd^2+ + 2e^- rightarrow Cd net cell reaction: 2ln + 3ed^2+ rightarrow 3ed + 2ln^3+
24) Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C. (The equation is balanced.) 26). 3 Cl2(8) +2 Fe(s) - 6 Cl(aq) + 2 Fe3+ (aq) 12(8)+2 e 2Cl(aq) E° 1.36 V 3C1tbe ! Fe3+(aq) + 3 e → Fe(s) 80036V 2Fe > 25€ Ep 3 + the A) 240 V B) 4.16V ) -1.32 V D) -1.40 V E) 1.32 V
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