The cell potential is 0.01934 V at 25°C.
<h3>What is a galvanic cell?</h3>
A galvanic cell, also known as a voltaic cell, is an electrochemical cell that converts the chemical energy generated by spontaneous redox reactions into electrical energy.
The main components of a galvanic cell are
Anode – Oxidation occurs at the anode
Cathode – Reduction occurs at the cathode
Salt bridge – consists of electrolytes that are needed to complete the circuit in a galvanic cell.
Half-cells – It is important as reduction and oxidation reactions are separated into compartments.
External circuit – it helps in Conducting the flow of electrons between electrodes
At cathode,
At anode,
![Fe(s)+2e^-\rightarrow Fe^{2+}(aq)](https://tex.z-dn.net/?f=Fe%28s%29%2B2e%5E-%5Crightarrow%20Fe%5E%7B2%2B%7D%28aq%29)
Overall cell reaction
![Fe(s)+Cd^{2+}(aq)\rightarrow Fe^{2+}(aq) + Cd(s)](https://tex.z-dn.net/?f=Fe%28s%29%2BCd%5E%7B2%2B%7D%28aq%29%5Crightarrow%20Fe%5E%7B2%2B%7D%28aq%29%20%2B%20Cd%28s%29)
![E^o_{cell} = E^o_{cathode} - E^o_{anode}](https://tex.z-dn.net/?f=E%5Eo_%7Bcell%7D%20%3D%20E%5Eo_%7Bcathode%7D%20-%20E%5Eo_%7Banode%7D)
= -0.40 -(0.44) = 0.04 V
Nernst equation is given by
![E_{cell} = E^o_{cell} - \frac{2.303RT}{nF} logQ](https://tex.z-dn.net/?f=E_%7Bcell%7D%20%3D%20E%5Eo_%7Bcell%7D%20-%20%5Cfrac%7B2.303RT%7D%7BnF%7D%20logQ)
At 25°C
![E_{cell} = E^o_{cell} - \frac{0.0592V}{n} logQ](https://tex.z-dn.net/?f=E_%7Bcell%7D%20%3D%20E%5Eo_%7Bcell%7D%20-%20%5Cfrac%7B0.0592V%7D%7Bn%7D%20logQ)
Here, n = 2 and log Q = log
= 0.699
= 0.01934 V
The cell potential is 0.01934 V at 25°C
Learn more about galvanic cell:
brainly.com/question/13918634
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