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 M and 10-4 M, respectively. Is the spontaneous reaction direction still the same as for the standard cell?
The room-temperature electrical conductivity of a silicon specimen is 1000 (Ω-m)-1. The electron concentration is known to be 8.87 x 1021 electron m-3. Assuming the electron and hole mobility values are 0.14 m2/V. s and 0.05 m2/V. s, respectively. Note that the density of the silicon is 2.33 g/cm3 and its atomic mass is 28.09 g/mol. The electron charge is 1.6 x 10-19 C and Avogadro’s number = 6.023 x 1023 atoms/mol. Answer the following questions: (a) Compute the hole concentration. (b) Calculate the number of free electron per atoms. (c) Is the specimen n-type extrinsic, or p-type extrinsic? Why?2-
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1-One-half of an electrochemical cell consists of a pure Zinc
electrode in a solution of Zn2+...
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...
Which of the following is a proper notation for the voltaic cell consisting of of one half-cell w...
Which of the following is a proper notation for the voltaic cell consisting of of one half-cell with a zinc electrode in 1 M Zn(NO3)2 solution and the other half-cell with a lead electrode in 1 MPb(NO3)2 solution and a KNO3 salt bridge. Pb2+(1 M) | Pb(s) || Zn(s) | Zn2+(1 M) Zn2+(1 M) | Zn(s) || Pb(s) | Pb2+(1 M) Pb(s) | Pb2+(1 M) || Zn2+(1 M) | Zn(s) Zn(s) | Zn2+(1 M) || Pb2+(1 M) | Pb(s)
One half-cell in a voltaic cell is constructed from a silver wire electrode in a AgNO3...
One half-cell in a voltaic cell is constructed from a silver wire electrode in a AgNO3 solution of unknown concentration. The other half-cell consists of a zinc electrode in a 1.9 M solution of Zn(NO3)2. A potential of 1.48 V is measured for this cell. Use this information to calculate the concentration of Ag (aq). E® Zn/Zn2+ = -0.763 V Eº Ag/Ag+ = 0.7994 V Concentration = Submit Answer Try Another Version 6 item attempts remaining
A voltaic cell contains two half-cells. One half-cell contains a zinc electrode immersed in a 1.00...
A voltaic cell contains two half-cells. One half-cell contains a zinc electrode immersed in a 1.00 M Zn(NO3)2 solution. The second half-cell contains a titanium electrode immersed in a 1.00 M Ti(NO3)3 solution. Zn2+(aq) + 2 e− → Zn(s) E⁰red = −0.762 V Ti3+(aq) + 3 e− → Ti(s) E⁰red = −1.370 V (a) Using the standard reduction potentials given above, predict the standard cell potential of the voltaic cell. _____ V (b) Write the overall balanced equation for the...
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...
A galvanic cell is constructed using a zinc electrode immersed in a 1.0 M Zn2+ solution...
A galvanic cell is constructed using a zinc electrode immersed in a 1.0 M Zn2+ solution and a silver electrode immersed in a 1.0 M Ag+ solution. What is the overall equation for this cell?
A galvanic cell consists of a Zn2+/Zn half-cell and a standard hydrogen electrode. If the Zn2+/Zn...
A galvanic cell consists of a Zn2+/Zn half-cell and a standard hydrogen electrode. If the Zn2+/Zn half-cell standard cell functions as the anode, and the standard cell potential is 0.76 V, what is the standard reduction potential for the Zn2+/Zn half-cell?
Consider an electrochemical cell with a zinc electrode immersed in a solution of ZnT and in electrical contact with a silver electrode immersed in a solution of Ag. If the initial concentrations...
Consider an electrochemical cell with a zinc electrode immersed in a solution of ZnT and in electrical contact with a silver electrode immersed in a solution of Ag. If the initial concentrations of Zinc and Silver ions are 0.0050 M and 16.00 M respectively, calculate +2 cell
Consider an electrochemical cell with a zinc electrode immersed in a solution of ZnT and in electrical contact with a silver electrode immersed in a solution of Ag. If the initial concentrations of...
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?
A concentration cell consists of two Zn/Zn2+ half-cells. The concentration of Zn2+ in one of the...
A concentration cell consists of two Zn/Zn2+ half-cells. The concentration of Zn2+ in one of the half-cells is 2.0 M and the concentration in the other half-cell is 1.0×10−3M. Indicate the half-reaction occurring at each electrode. Express your answers as chemical equations separated by a comma. Identify all of the phases in your answer.
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...
One half-cell in a voltaic cell is constructed from a silver wire electrode in a AgNO3 solution of unknown concentration. The other half-cell consists of a zinc electrode in a 1.9 M solution of Zn(NO3)2. A potential of 1.48 V is measured for this cell. Use this information to calculate the concentration of Ag (aq). E® Zn/Zn2+ = -0.763 V Eº Ag/Ag+ = 0.7994 V Concentration = Submit Answer Try Another Version 6 item attempts remaining
Consider an electrochemical cell with a zinc electrode immersed in a solution of ZnT and in electrical contact with a silver electrode immersed in a solution of Ag. If the initial concentrations of Zinc and Silver ions are 0.0050 M and 16.00 M respectively, calculate +2 cell
Consider an electrochemical cell with a zinc electrode immersed in a solution of ZnT and in electrical contact with a silver electrode immersed in a solution of Ag. If the initial concentrations of...
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