5 Questions
Which type of cell is used for electrolysis?
Electrolytic cell
What is the Nernst equation used for?
Calculating the emf of a galvanic cell
What is the molar conductivity at zero concentration or infinite dilution called?
Molar conductivity
What is the relation between the standard potential of a cell, Gibbs energy of the cell reaction, and its equilibrium constant?
They are directly proportional
What does Kohlrausch's law enunciate?
The relation between conductivity and molar conductivity
Study Notes
Electrolysis
- An electrolytic cell is used for electrolysis, which is a non-spontaneous redox reaction that requires an external voltage source.
Nernst Equation
- The Nernst equation is used to relate the reduction potential of a half-cell to the standard electrode potential, temperature, and activities of the species involved.
Molar Conductivity
- The molar conductivity at zero concentration or infinite dilution is called limiting molar conductivity (Λ°).
Cell Potential, Gibbs Energy, and Equilibrium Constant
- The standard potential of a cell (E°), Gibbs energy of the cell reaction (ΔG), and its equilibrium constant (K) are related by the equation: ΔG = -nFE° = -RT lnK.
Kohlrausch's Law
- Kohlrausch's law states that at infinite dilution, the molar conductivity of an electrolyte solution is equal to the sum of the molar conductivities of its individual ions.
Test your knowledge on electrochemical cells, Nernst equation, standard potential, and resistivity in this quiz.
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