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(a)
Interpretation:
The current density and overpotential of reduction of azobenzene has to be calculated.
Concept Introduction:
When the
E(cathode) is electrode’s potential which is attached to negative terminal of current source.
E(anode) is electrode’s potential which is attached to positive terminal of current source.
Overpotential: The activation energy of a reaction at an electrode can be overcome by voltage. The required voltage to apply is called overpotential.
Ohmic potential: In
Concentration Polarization: It is the change in concentration of products and reactants at electrode’s surface unlike they are same in solution.
(a)
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Answer to Problem 17.21P
The overpotential of reduction of azobenzene is
Explanation of Solution
To determine: The current density and overpotential of reduction of azobenzene.
The reduction of azobenzene is given as
The current density of reduction of azobenzene is
For smooth platinum electrode current density of
Over potential is
(b)
Interpretation:
The cathode potential at which azobenzene get reduced has to be calculated
Concept Introduction:
When the electric current is too small, the voltage of cell is given as
E(cathode) is electrode’s potential which is attached to negative terminal of current source.
E(anode) is electrode’s potential which is attached to positive terminal of current source.
Overpotential: The activation energy of a reaction at an electrode can be overcome by voltage. The required voltage to apply is called overpotential.
Ohmic potential: In electrochemical cell, the electrical resistance of a solution while current I flows can be overcome by voltage. The required voltage to apply is called ohmic potential.
Concentration Polarization: It is the change in concentration of products and reactants at electrode’s surface unlike they are same in solution.
(b)
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Answer to Problem 17.21P
The cathode potential at which azobenzene get reduced is
Explanation of Solution
To determine: The cathode potential at which azobenzene get reduced.
(c)
Interpretation:
The anode potential at which oxygen get reduced to water has to be calculated
Concept Introduction:
When the electric current is too small, the voltage of cell is given as
E(cathode) is electrode’s potential which is attached to negative terminal of current source.
E(anode) is electrode’s potential which is attached to positive terminal of current source.
Overpotential: The activation energy of a reaction at an electrode can be overcome by voltage. The required voltage to apply is called overpotential.
Ohmic potential: In electrochemical cell, the electrical resistance of a solution while current I flows can be overcome by voltage. The required voltage to apply is called ohmic potential.
Concentration Polarization: It is the change in concentration of products and reactants at electrode’s surface unlike they are same in solution.
(c)
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Answer to Problem 17.21P
The anode potential at which oxygen get reduced is
Explanation of Solution
To determine: The anode potential at which azobenzene get reduced.
(d)
Interpretation:
The voltage at which azobenzene reduced to aniline has to be calculated
Concept Introduction:
When the electric current is too small, the voltage of cell is given as
E(cathode) is electrode’s potential which is attached to negative terminal of current source.
E(anode) is electrode’s potential which is attached to positive terminal of current source.
Overpotential: The activation energy of a reaction at an electrode can be overcome by voltage. The required voltage to apply is called overpotential.
Ohmic potential: In electrochemical cell, the electrical resistance of a solution while current I flows can be overcome by voltage. The required voltage to apply is called ohmic potential.
Concentration Polarization: It is the change in concentration of products and reactants at electrode’s surface unlike they are same in solution.
(d)
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Answer to Problem 17.21P
The voltage at which azobenzene reduced to aniline is
Explanation of Solution
To determine: The voltage at which azobenzene reduced to aniline.
The reduction of azobenzene is given as
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Chapter 17 Solutions
Quantitative Chemical Analysis
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