13. (10 marks) One half of an electrochemical cell consists of a pure Ni electrode in...
13. (10 marks) One half of an electrochemical cell consists of a pure Ni electrode in a solution conatining Ni2+ ions; the other half is a Cd electrode in a Cd2+ solution. Both cells are at 25 ℃. The two half cells are connected with an electrical wire. (a) Under standard conditions, explain which half cell will be anodic? Write the full electrochemical reaction. (b) If the cell voltage output is measured to be 0.12 V when [Ni2+] = 0.3 ?, calculate the concentration of Cd2+. (c) Explain what will happen to the concentration of Ni2+ and Cd2+ ions and the output voltage when the electrochemical cell in (b) is being discharged (used).
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13. (10 marks) One half of an electrochemical cell consists of a
pure Ni electrode in...
An electrochemical cell is constructed such that on one side a pure nickel electrode is in...
An electrochemical cell is constructed such that on one side a pure nickel electrode is in contact with a solution containing Ni2+ ions at a concentration of 5*10-3 M. The other cell half consists of a pure Fe electrode that is immersed in a solution of Fe2+ ions having a concentration of 0.3 M. At what temperature will the potential between the two electrodes be +0.140 V?
1-One-half of an electrochemical cell consists of a pure Zinc electrode in a solution of Zn2+...
1-One-half of an electrochemical cell consists of a pure Zinc electrode in a solution of Zn2+ ions; the other half is a Lead electrode immersed in a solution of Pb2+ solution. The half-cell potentials for Zinc and Lead are -0.763 V and -0.126 V, respectively. (a) If the cell is a standard one, write the spontaneous overall reaction and calculate the voltage that is generated. (b) Compute the cell potential at 25oC if the Zn2+ and Pb2+ concentrations are 10-2...
19 20 Question 16 Half-cell Potentials: Half Reaction: E' value + 0.80 V +0.77 V Agte...
19 20 Question 16 Half-cell Potentials: Half Reaction: E' value + 0.80 V +0.77 V Agte → AS Fe3+ + + Fe2+ Cu2+ 2e → Cu Pb2+ + 2e → Pb +0.34 V -0.13 V Ni2+ + 2e → NI -0.25 V - 0.40 V Cd2+ +2e → ca Fe2+ + 2e → Fe Zn2+ + 2e → Zn -0.44 V - 0.76 V A13+ +3 → AI - 1.66 V Consider an electrochemical cell constructed from the following half...
A voltaic cell consists of an Ni/Ni2+ half-cell and a Co/Co2+ half-cell. Calculate Ecell when conc....
A voltaic cell consists of an Ni/Ni2+ half-cell and a Co/Co2+ half-cell. Calculate Ecell when conc. of Ni2+ = 0.142 M and of Co2+ = 0.468 M. The reduction potential for Ni2+ is -0.247 V and for Co2+ is -0.277 V. Answer: 0.01467 A voltaic cell consists of an Al/Al3+ half-cell and a Cd/Cd2+ half-cell. Calculate {Al3+} when {Cd2+} = 0.401 M and Ecell = 1.299 V.Use reduction potential values of Al3+ = -1.66 V and for Cd2+ = -0.40...
The electrochemical cell represented in consists of two electrodes. One is solid NiO/Ni mixture, other is...
The electrochemical cell represented in consists of two
electrodes. One is solid NiO/Ni mixture, other is gaseous O2
electrode. The porous platinum coating also acts as a catalyst. The
electrolyte is a ZrO2/Y2O3 solid solution that conducts oxygen ions
between the oxygen side and the
NiO/Ni side. The standard free energy of reaction for Ni+1/2
O2--> NiO is ?G=-244,550+98.5 T (J) (where T is in Kelvin)
What is the open circuit voltage at 1000 K when the oxygen
pressure on...
In a copper-zinc voltaic cell, one half-cell consists of a ZnZn electrode inserted in a solution...
In a copper-zinc voltaic cell, one half-cell consists of a ZnZn
electrode inserted in a solution of zinc sulfate and the other
half-cell consists of a CuCu electrode inserted in a copper sulfate
solution. These two half-cells are separated by a salt bridge.
At the zinc electrode (anode), ZnZn metal undergoes oxidation by
losing two electrons and enters the solution as Zn2+Zn2+ ions. The
oxidation half-cell reaction that takes place at the anode is
Zn(s)→Zn2+(aq)+2e−Zn(s)→Zn2+(aq)+2e−
The CuCu ions undergo reduction...
Half-cell Potentials: Half Reaction: E value +0.80 V Agt + e → Ag Fe3+ + €...
Half-cell Potentials: Half Reaction: E value +0.80 V Agt + e → Ag Fe3+ + € → Fe2+ +0.77 v +0.34 V -0.13 V Cu2+ +2e → Cu Pb2+ + 2e - → Ib Ni2+ + 2e → Ni Cd2+ +2e → Cd -0.25 V -0.40 V Fe2+ + 2e → Fe -0.44 V Zn2+ + 2e → Zn -0.76 V Al3+ +3e → AI - 1.66 V Consider an electrochemical cell constructed from the following half cells, linked by...
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...
Galvanic cell consists of Co Co2standard electrode and Ni Ni electrode. At what concentration of nickel electrolyte...
Galvanic cell consists of Co Co2standard electrode and Ni Ni electrode. At what concentration of nickel electrolyte the theoretical voltage of the cell will be zero?
A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 °C. The...
A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 °C. The initial concentrations of Ni2+ and Zn2+ are 1.00 M and 0.150 M respectively. a. What is the initial cell potential? b. What is the cell potential when the concentration of Ni2+ has fallen to 0.250 M? (Hint: What should the concentration of Zn2+ be if Ni2+ has fallen from its original concentration to its current concentration?)
19 20 Question 16 Half-cell Potentials: Half Reaction: E' value + 0.80 V +0.77 V Agte → AS Fe3+ + + Fe2+ Cu2+ 2e → Cu Pb2+ + 2e → Pb +0.34 V -0.13 V Ni2+ + 2e → NI -0.25 V - 0.40 V Cd2+ +2e → ca Fe2+ + 2e → Fe Zn2+ + 2e → Zn -0.44 V - 0.76 V A13+ +3 → AI - 1.66 V Consider an electrochemical cell constructed from the following half...
The electrochemical cell represented in consists of two
electrodes. One is solid NiO/Ni mixture, other is gaseous O2
electrode. The porous platinum coating also acts as a catalyst. The
electrolyte is a ZrO2/Y2O3 solid solution that conducts oxygen ions
between the oxygen side and the
NiO/Ni side. The standard free energy of reaction for Ni+1/2
O2--> NiO is ?G=-244,550+98.5 T (J) (where T is in Kelvin)
What is the open circuit voltage at 1000 K when the oxygen
pressure on...
In a copper-zinc voltaic cell, one half-cell consists of a ZnZn
electrode inserted in a solution of zinc sulfate and the other
half-cell consists of a CuCu electrode inserted in a copper sulfate
solution. These two half-cells are separated by a salt bridge.
At the zinc electrode (anode), ZnZn metal undergoes oxidation by
losing two electrons and enters the solution as Zn2+Zn2+ ions. The
oxidation half-cell reaction that takes place at the anode is
Zn(s)→Zn2+(aq)+2e−Zn(s)→Zn2+(aq)+2e−
The CuCu ions undergo reduction...
Half-cell Potentials: Half Reaction: E value +0.80 V Agt + e → Ag Fe3+ + € → Fe2+ +0.77 v +0.34 V -0.13 V Cu2+ +2e → Cu Pb2+ + 2e - → Ib Ni2+ + 2e → Ni Cd2+ +2e → Cd -0.25 V -0.40 V Fe2+ + 2e → Fe -0.44 V Zn2+ + 2e → Zn -0.76 V Al3+ +3e → AI - 1.66 V Consider an electrochemical cell constructed from the following half cells, linked by...
Galvanic cell consists of Co Co2standard electrode and Ni Ni electrode. At what concentration of nickel electrolyte the theoretical voltage of the cell will be zero?
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