
What will be the E cell of the cell given:
(a)
(b)
(c)
(d)
Answer
436.8k+ views
Hint :Nernst equation is used to calculate the cell potential of an electrochemical cell at a given pressure, temperature and concentration of the reactant. The value of the cell potential of standard hydrogen electrodes at temperature i.e. is taken as zero.
Complete Step By Step Answer:
The above equation is the redox reaction of hydrogen gas and the platinum electrode acts as a reference electrode. Platinum electrode is inert in nature so it cannot corrode easily. It also improves reaction kinetics by absorbing hydrogen at its interface.
We know that standard hydrogen electrode (SHE) is used as a reference for comparison with any other electrode and it is measured at temperature and the pressure of hydrogen gas is equal to Bar. This reaction takes place on platinum electrode The value of the cell potential for SHE is declared as zero and called as standard hydrogen electrode potential i.e. .
Reaction at Anode i.e. oxidation
Reaction at Cathode i.e. reduction
The complete chemical reaction is as follow:-
According to the Nernst equation-
Where,
=Standard electrode potential
E cell = Electrode potential
R= Universal Gas Constant ( )
T= temperature in Kelvins
F= Faraday’s constant ( )
Keq =Equilibrium constant
n= number of electrons transferred in the cell.
By substituting values of R, T ( ),and F
We get,
Here, in this question the pressure of is the same, so we do not consider it.
We know that,
Here, n=
We get,
E cell =
The E cell of the given cell is
Hence, the correct answer is option (C).
Note :
Always remember that the Platinum is considered as an inert electrode so it does not participate in the redox reaction but it provides oxidation and reduction surface. The value of standard hydrogen potential (SHE) is taken as zero. Also, the Nernst equation is derived from the Gibbs free energy at standard conditions, but it enables the determination of cell potential under non- standard conditions. It also allows the determination of equilibrium constants as it relates the measured cell potential to the reaction quotient.
Complete Step By Step Answer:
The above equation is the redox reaction of hydrogen gas and the platinum electrode acts as a reference electrode. Platinum electrode is inert in nature so it cannot corrode easily. It also improves reaction kinetics by absorbing hydrogen at its interface.
We know that standard hydrogen electrode (SHE) is used as a reference for comparison with any other electrode and it is measured at temperature
Reaction at Anode i.e. oxidation

Reaction at Cathode i.e. reduction

The complete chemical reaction is as follow:-

According to the Nernst equation-
Where,
E cell = Electrode potential
R= Universal Gas Constant (
T= temperature in Kelvins
F= Faraday’s constant (
Keq =Equilibrium constant
n= number of electrons transferred in the cell.
By substituting values of R, T (
We get,
Here, in this question the pressure of
We know that,
Here, n=
We get,
E cell =
The E cell of the given cell is
Hence, the correct answer is option (C).
Note :
Always remember that the Platinum is considered as an inert electrode so it does not participate in the redox reaction but it provides oxidation and reduction surface. The value of standard hydrogen potential (SHE) is taken as zero. Also, the Nernst equation is derived from the Gibbs free energy at standard conditions, but it enables the determination of cell potential under non- standard conditions. It also allows the determination of equilibrium constants as it relates the measured cell potential to the reaction quotient.
Latest Vedantu courses for you
Grade 10 | MAHARASHTRABOARD | SCHOOL | English
Vedantu 10 Maharashtra Pro Lite (2025-26)
School Full course for MAHARASHTRABOARD students
₹33,300 per year
Recently Updated Pages
Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
Which are the Top 10 Largest Countries of the World?

a Tabulate the differences in the characteristics of class 12 chemistry CBSE

Why is the cell called the structural and functional class 12 biology CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Derive an expression for electric potential at point class 12 physics CBSE

What is the Full Form of PVC, PET, HDPE, LDPE, PP and PS ?
