The cell constant of a conductivity cell _____________. (i) changes with the change of electrolyte. (ii) changes with the change of concentration of electrolyte. (iii) changes with the temperature of the electrolyte. (iv) remains constant for a cell

Answer: (iv)

The conductivity cell’s cell constant is a constant physical quantity.

Cell constant remains constant for conductivity cells. The value of cell constant (K) equals the interval between the electrodes (in cm.) divided by the total area of these electrodes (measured in cm2).

Cell constant’s formula = length/ area

S.I. unit of surface area = m2.

While length’s S.I. unit is meter, therefore, cell constant equals m/m2.

Unit cell constant = m-1 or cm-1.