Pt1 An electrochemical cell is set up at 25°C based on the overall reaction represented by...
Pt1
An electrochemical cell is set up at 25°C based on the overall reaction represented by the balanced equation shown below. The cell initially has [Cr3+] = [Cu2+] and E°cell = +1.08 V. 3Cu2+(aq)+2Cr(s)harpoon_left.pngharpoon_rigth.png3Cu(s)+2Cr3+(aq)
-Using the relationship given in part 1, calculate Ecell if [Cu2+] = 1.453 M and [Cr3+] = 0.00209 M, assuming that the temperature remains at 25°C. Give your answer to two places after the decimal. (R = 8.314 J/mol·K and F = 9.65 × 104 C/mol e–)
Homework Answers
Answer :-
Firstly a balanced overall cell reaction is written by writing two halves reaction of half cells and number of electrons transferred. Then Nernst equation is used.
The answer is given in the image,
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An electrochemical cell is set up at 25°C based on the overall
reaction represented by...
An electrochemical cell is set up at 25°C based on the overall reaction represented by the...
An electrochemical cell is set up at 25°C based on the overall reaction represented by the balanced equation shown below. The cell initially has [Cr3+] = [Cu2+] and E°cell = +1.08 V. $$3Cu2+(aq)+2Cr(s)3Cu(s)+2Cr3+(aq) How many moles of electrons are transferred per reaction cycle (i.e., for 1 cycle of the equation as written)? 6 Part 3 (1 point) Using the relationship given in part 1, calculate Ecell if [Cu2+] = 1.453 M and [Cr3+] = 0.00176 M, assuming that the temperature remains...
When the Cu2+ concentration is 6.58×10-4 M, the observed cell potential at 298K for an electrochemical...
When the Cu2+ concentration is 6.58×10-4 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 0.979V. What is the Cr3+ concentration? 3Cu2+(aq) + 2Cr(s)3Cu(s) + 2Cr3+(aq) Answer: M When the Cu2+ concentration is 2.71×10-4 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 0.971V. What is the Cr3+ concentration? 3Cu2+(aq) + 2Cr(s)3Cu(s) + 2Cr3+(aq) Answer: M
What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when...
What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Cu2+ concentration is 3.12×10-4 M and the Cr3+ concentration is 1.44 M ? 3Cu2+(aq) + 2Cr(s)3Cu(s) + 2Cr3+(aq) Answer: V The cell reaction as written above is spontaneous for the concentrations given: true/false
When the Hg2+ concentration is 1.06 M, the observed cell potential at 298K for an electrochemical...
When the Hg2+ concentration is 1.06 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 1.656V. What is the Cr3+ concentration? 3Hg2+(aq) + 2Cr(s)—13Hg(1) + 2Cr3+ (aq) Answer: M
Consider an electrochemical cell based on the following cell diagram: Pt1 Cut(aq), Cu2+ (aq) || C12(),...
Consider an electrochemical cell based on the following cell diagram: Pt1 Cut(aq), Cu2+ (aq) || C12(), CI (aq) | Pt Given that the standard cell emf is 1.20V and that the standard reduction potential of chlorine is 1.36 V, what is the standard reduction potential E*(Cu?+/Cut)? A) 1.01V B) 1.06 V C) 0.16 V D) 2.56 V E) -0.16 V
What is the calculated value of the cell potential at 298K for an electrochemical cell with...
What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Hg2+ concentration is 5.92×10-4 M and the Cr3+ concentration is 1.02 M ? 3Hg2+(aq) + 2Cr(s)3Hg(l) + 2Cr3+(aq) Answer: V The cell reaction as written above is spontaneous for the concentrations given: _______true or false
Write the net cell equation for the electrochemical cell. Phases are optional. Do not include the...
Write the net cell equation for the electrochemical cell. Phases are optional. Do not include the concentrations. Cu(s) Cu2 (aq, 0.0155 M) || Agt (aq, 2.50 M)| Ag(s) net cell equation: Calculate E and Ecell at 25 C, using standard potentials as needed cell V cell Ecell V
Calculate the potential of the electrochemical cell and determine if it is spontaneous as written at 25 °C Cu(s) Cu2 (0...
Calculate the potential of the electrochemical cell and determine if it is spontaneous as written at 25 °C Cu(s) Cu2 (0.12 M |Fe2 (0.0012 M) Fe(s) E2 =-0.440 V Efe/Fe = 0.339 V Cu2t/Cu Is the electrochemical cell spontaneous or not spontaneous Ecell V as written at 25 °C? not spontaneous spontaneous Calculate the potential of the electrochemical cell and determine if it is spontaneous as written at 25 °C. Pt(s) Sn2(0.0060 M), Sn4+(0.14 M) Fe3+(0.13 M), Fe2+(0.0056 M) Pt(s)...
0 What is the Ecell for the cell represented by the combination of the following 4)...
0 What is the Ecell for the cell represented by the combination of the following 4) half-reactions? 2Hg2+(aq) + 2e-→Hg22+(aq) Cr3t(ag)+3eCr(s) E-0.92 V B) 1.28 V 9) 0.18 V A) 2.12 V D) 1.66 V E)-0.18 V 5) Examine the following half-reactions and select the weakest oxidizing agent among the 5)_ species listed. E。= 0.854 V E1.185 V K+(aq) + e-→ K(s) F20(aq) + 2H+(aq) + 4e-→ 2p-(aq) + H20() E。= 2.153 V A) F2o(ag) B) AuBr4Taq) C) Mn2+(ag) D)...
A galvanic cell is assembled from one half cell with a nickel electrode immersed in Ni...
A galvanic cell is assembled from one half cell with a nickel electrode immersed in Ni 2+ aqueous solutions in one beaker where [Ni2+] = 1.2 M coupled to a second half cell with a chromium electrode immersed in a Cr3+ aqueous solution to give Ecell = +0.55 V at 25 °C. 3Ni2+(aq) + 2Cr(s) → 3Ni(s) + 2Cr3+(aq) Eϴ cell = +0.50 V Calculate the concentration of the chromium ions [Cr3+] in solution. (A) 1.9 x10^–1 M (B) 6.7...
When the Hg2+ concentration is 1.06 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 1.656V. What is the Cr3+ concentration? 3Hg2+(aq) + 2Cr(s)—13Hg(1) + 2Cr3+ (aq) Answer: M
Consider an electrochemical cell based on the following cell diagram: Pt1 Cut(aq), Cu2+ (aq) || C12(), CI (aq) | Pt Given that the standard cell emf is 1.20V and that the standard reduction potential of chlorine is 1.36 V, what is the standard reduction potential E*(Cu?+/Cut)? A) 1.01V B) 1.06 V C) 0.16 V D) 2.56 V E) -0.16 V
Write the net cell equation for the electrochemical cell. Phases are optional. Do not include the concentrations. Cu(s) Cu2 (aq, 0.0155 M) || Agt (aq, 2.50 M)| Ag(s) net cell equation: Calculate E and Ecell at 25 C, using standard potentials as needed cell V cell Ecell V
Calculate the potential of the electrochemical cell and determine if it is spontaneous as written at 25 °C Cu(s) Cu2 (0.12 M |Fe2 (0.0012 M) Fe(s) E2 =-0.440 V Efe/Fe = 0.339 V Cu2t/Cu Is the electrochemical cell spontaneous or not spontaneous Ecell V as written at 25 °C? not spontaneous spontaneous Calculate the potential of the electrochemical cell and determine if it is spontaneous as written at 25 °C. Pt(s) Sn2(0.0060 M), Sn4+(0.14 M) Fe3+(0.13 M), Fe2+(0.0056 M) Pt(s)...
0 What is the Ecell for the cell represented by the combination of the following 4) half-reactions? 2Hg2+(aq) + 2e-→Hg22+(aq) Cr3t(ag)+3eCr(s) E-0.92 V B) 1.28 V 9) 0.18 V A) 2.12 V D) 1.66 V E)-0.18 V 5) Examine the following half-reactions and select the weakest oxidizing agent among the 5)_ species listed. E。= 0.854 V E1.185 V K+(aq) + e-→ K(s) F20(aq) + 2H+(aq) + 4e-→ 2p-(aq) + H20() E。= 2.153 V A) F2o(ag) B) AuBr4Taq) C) Mn2+(ag) D)...
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