Homework Answers
First Question:
Cell potential Ecell= E0(cathode) - E0(anode) = and is for an electrochemical cell, not for electromagnetic cell.
Also Cell potential doesnot depend on size of the battery alone, it depends on the concentration of reactants. Size alone is immaterial.
When cell discharges concentration change occurs such that Ecell decreases.
Ecell = emf, called elctromotif force.
So only statement c) is correct.
For second question only C) is correct.
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Which of the following statements is TRUE? Select one: a. Cell potential is the difference in...
Which of the following statements is TRUE? Select one: a. Two of the other statements are...
Which of the following statements is TRUE? Select one: a. Two of the other statements are correct b. None of the other statements are correct c. In a galvanic cell, oxidation occurs in the half cell which has the negative reduction potential d. In a galvanic cell which uses the standard Cut/Cu half-cell (E° = +0.16 V) and the standard hydrogen electrode (E 0.00 V), reduction occurs in the standard hydrogen electrode e. In a galvanic cell, reduction occurs in...
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode...
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell: Pt(s)|H2(g,1atm)|H+(aq,1.0M)||Au3+(aq,?M)|Au(s). What is the concentration of Au3+ in the solution if Ecell is 1.26 V ? To what pH should you adjust a standard hydrogen electrode to get an electrode potential of -0.117 V ? (Assume that the partial pressure of hydrogen gas remains at 1 atm.) Express your answer using two decimal places.
Part A through H 1. [60 pts) A galvanic cell is a type of battery where...
Part A through H
1. [60 pts) A galvanic cell is a type of battery where the electrodes are immersed in different electrolyte solutions, which are connected by an ion-conducting bridge. Consider a galvanic cell with Al and Cu electrodes. The Al electrode is immersed in a solution containing a standard concentration of Al3+ ions and the Cu electrode is immersed in a solution containing a standard concentration of Cu* ions. External Circuit The standard reduction potentials for the half...
What is the standard cell potential of a cell created using a cadmium electrode in 0.45...
What is the standard cell potential of a cell created using a cadmium electrode in 0.45 M Cd(NO3)2(aq) and a graphite electrode in an aqueous solution that is 0.45 M in both Fe2+ and Fe3+? 0.38 V 1.95 V 1.94 V 1.17 V 1.18 V What is the standard cell potential of a cell which utilizes the following reaction: Zn (s) + Ni2+ (aq) → Ni (s) + Zn2+ (aq) All solutions are 1.0 M and the reaction occurs at...
Module 2b. Electrochemistry. Corrosion. An Options Questions Concepts, Postulates and Laws work which has done by t...
Module 2b. Electrochemistry. Corrosion. An Options Questions Concepts, Postulates and Laws work which has done by the forces of electric field . 0.75 Potential difference between two points is equal required to obtain the number of Faraday amount of electricit to work which has done by the forces of electric field required to transport a unit charge from one point to another work which has done by the forces of electric field 2. 0.75Reduction means loss of electrons by atoms...
a.) A voltaic cell is constructed in which the cathode is a standard hydrogen electrode and...
a.) A voltaic cell is constructed in which the cathode is a standard hydrogen electrode and the anode is a hydrogen electrode (P(H2) = 1 atm) immersed in a solution of unknown [H+]. If the cell potential is 0.204 V, what is the pH of the unknown solution at 298 K? b.) An electrochemical cell is constructed in which a Cr3+(1.00 M)|Cr(s) half-cell is connected to an H3O+(aq)|H2(1 atm) half-cell with unknown H3O+ concentration. The measured cell voltage is 0.366...
1a) In the following spontaneous voltaic cell, which of the following statements are TRUE? Select as...
1a) In the following spontaneous voltaic cell, which of the following statements are TRUE? Select as many answers as are correct however points will be deducted for incorrect guesses. Zn(s)|Zn2+(aq)||H+(aq)|H2(g)|Pt(s) Select one or more: Zn/Zn2+ is the anode Eºcell is positive H+/H2 is the cathode Zn/Zn2+ is the cathode H+/H2 is the anode Eºcell is negative
A. Calculate the cell potential that would result in the following electrochemical cell at 25oC: ...
A. Calculate the cell potential that would result in the following electrochemical cell at 25oC: Pt | UO22+(0.10M),U4+(0.22M),H+(0.60M) || Ag+(0.034M) | Ag Line notation is anode || cathode Write Nernst equations for the anode and cathode separately. Then Ecell = Ecathode - E anode B. If the electrochemical cell Ag/AgCl || Zn2+(x M) | Zn(s) develops a potential of -1.039 volts at 25oC, what is the Zn2+ concentration in the solution? (Answer in decimal format) Ag/AgCl reference electrode has E=0.199...
14. Determine the standard cell potential and the cell potential under the stated conditions for the...
14. Determine the standard cell potential and the cell potential under the stated conditions for the electrochemical reactions described here. State whether each is spontaneous or nonspontaneous under each set of conditions at 298.15 K. a) Hg(l) + S2-(ag, 0.10 M) + 2Ag+(ag, 0.25 M) → 2Ag(s) + HgS(s) \ (b) The galvanic cell made from a half-cell consisting of an aluminum electrode in 0.015 M aluminum nitrate solution and a half-cell consisting of a nickel electrode in 0.25 M...
The cell potential of the following electrochemical cell depends on the pH of the solution in...
The cell potential of the following electrochemical cell depends on the pH of the solution in the anode half-cell: Pt(s)|H2(g,1atm)|H+(aq,?M)||Cu2+(aq,1.0M)|Cu(s). What is the pH of the solution if Ecell is 360 mV ?
Which of the following statements is TRUE? Select one: a. Two of the other statements are correct b. None of the other statements are correct c. In a galvanic cell, oxidation occurs in the half cell which has the negative reduction potential d. In a galvanic cell which uses the standard Cut/Cu half-cell (E° = +0.16 V) and the standard hydrogen electrode (E 0.00 V), reduction occurs in the standard hydrogen electrode e. In a galvanic cell, reduction occurs in...
Part A through H
1. [60 pts) A galvanic cell is a type of battery where the electrodes are immersed in different electrolyte solutions, which are connected by an ion-conducting bridge. Consider a galvanic cell with Al and Cu electrodes. The Al electrode is immersed in a solution containing a standard concentration of Al3+ ions and the Cu electrode is immersed in a solution containing a standard concentration of Cu* ions. External Circuit The standard reduction potentials for the half...
What is the standard cell potential of a cell created using a cadmium electrode in 0.45 M Cd(NO3)2(aq) and a graphite electrode in an aqueous solution that is 0.45 M in both Fe2+ and Fe3+? 0.38 V 1.95 V 1.94 V 1.17 V 1.18 V What is the standard cell potential of a cell which utilizes the following reaction: Zn (s) + Ni2+ (aq) → Ni (s) + Zn2+ (aq) All solutions are 1.0 M and the reaction occurs at...
Module 2b. Electrochemistry. Corrosion. An Options Questions Concepts, Postulates and Laws work which has done by the forces of electric field . 0.75 Potential difference between two points is equal required to obtain the number of Faraday amount of electricit to work which has done by the forces of electric field required to transport a unit charge from one point to another work which has done by the forces of electric field 2. 0.75Reduction means loss of electrons by atoms...
14. Determine the standard cell potential and the cell potential under the stated conditions for the electrochemical reactions described here. State whether each is spontaneous or nonspontaneous under each set of conditions at 298.15 K. a) Hg(l) + S2-(ag, 0.10 M) + 2Ag+(ag, 0.25 M) → 2Ag(s) + HgS(s) \ (b) The galvanic cell made from a half-cell consisting of an aluminum electrode in 0.015 M aluminum nitrate solution and a half-cell consisting of a nickel electrode in 0.25 M...
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