Question

What is the significance of cell constant in electrochemistry?

Answer 1

Cell constant is of particular cell is determined as the ratio of the distance between the electrodes of the cell to the area of the electrodes.
cell constant K = l/A = cm-1
Relationship between cell constant and conductivity:
Conductivity is the ability of a solution to pass an electric current and it is related to cell constant by following relation:
conductivity of the cell = conductance x cell constant
Here conductance is reciprocal of resistance or given by 1/R

Answer 2

Answer:

Concept:

The cell constant is defined by the distance between the electrodes (l) and their cross-sectional area (A).

Explanation:

The theoretical electrode consisting of a gap of 1 cm between two 1 cm square plates is what the cell constant, K, is defined as. For a cell constant, there are units of 1/cm (per centimeter), where the sum corresponds to the ratio of the space between the electrode plates to the surface area of the plates.

Typically, the resistance of a solution containing a cell with known conductivity is used to calculate the cell constant. For this reason, we typically employ KCl solutions, whose conductivity is accurately characterized at various concentrations and temperatures.

The cell constant of a specific cell determines the ratio of the distance between the cell electrodes and the area of the electrodes.

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