Concept explainers
(a)
The reactions that occur at the two electrode.
(a)
Explanation of Solution
Introduction:
The voltage developed in an electrochemical cell is directly related to the Gibbs free energy change of the reaction. The standard-electrode potentials are determined under equilibrium conditions at room temperature
The copper reduction reaction is more electropositive than the iron reduction reaction.
Copper deposits on the copper electrode in accordance with the reduction reaction.
The copper reduction reaction or the reaction at cathode is given by,
The oxidation reaction at the anode is given by,
Conclusion:
Thus, the reaction at the cathode is
(b)
The voltage developed in the cell.
(b)
Answer to Problem 10.6P
The voltage developed in the cell is
Explanation of Solution
Given:
The mass of copper in the solution is
The volume of solution is
The mass of iron is
Formula Used:
Write the expression for the concentration of copper.
Here,
Write the expression for the concentration of iron.
Here,
Write the expression for the half-cell voltage at the copper electrode.
Here,
Write the expression for the half-cell voltage at the iron electrode.
Here,
Write the expression for the voltage developed in the cell.
Here,
Calculation:
Substitute
Substitute
Substitute
Substitute
Here, negative sign indicate the voltage at anode.
Substitute
Conclusion:
Therefore, the voltage developed in the cell is
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Chapter 10 Solutions
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- Materials Science And Engineering PropertiesCivil EngineeringISBN:9781111988609Author:Charles GilmorePublisher:Cengage Learning