The cell constant of a conductivity cell ___

The cell constant of a conductivity cell is a crucial parameter that defines the cell's geometry and its influence on conductivity measurements. It is determined by the ratio of the distance between the electrodes (l) to the cross-sectional area (A) of the electrodes:

Cell Constant (K) = l / A

This relationship indicates that the cell constant is directly proportional to the distance between the electrodes and inversely proportional to their surface area. Therefore, any changes in these geometric factors will alter the cell constant. However, for a given conductivity cell with fixed electrode dimensions and spacing, the cell constant remains unchanged.

Factors Affecting the Cell Constant

• Electrode Distance (l): Increasing the distance between electrodes increases the cell constant, while decreasing the distance reduces it.
• Electrode Area (A): Enlarging the electrode area decreases the cell constant, whereas reducing the area increases it.

It's important to note that the cell constant is independent of the properties of the electrolyte solution, such as its type, concentration, or temperature. These factors influence the solution's conductivity but do not affect the cell constant itself.

Given that the cell constant is determined solely by the physical dimensions of the conductivity cell and remains unaffected by external factors such as the electrolyte's nature, concentration, or temperature, it remains constant for a given cell. Therefore, the correct answer is: