JEE MainChemistryElectrochemistryNumerical+4 / −1
Emf of the following cell at 298K in V is x 10 2. |(0.1 M)|| (0.01 M)| The value of x is . (Rounded off to the nearest integer) [Given : ]
Numerical answer
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Correct answer: 147
- Write the cell reaction
Given cell:
At anode:
At cathode:
Balancing electrons:
Overall reaction:
So, number of electrons transferred is
- Calculate standard emf of the cell
- Write the reaction quotient
For the overall reaction,
Given:
Hence,
- Apply Nernst equation at 298 K
Substitute values:
Since,
So,
- Express in the form V
Rounded to nearest integer,
Hence, the required answer is:
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