What Is Cell Constant?

What is cell constant How is it experimentally determined?

The specific conductance (K) is given by K = (1/R) (l/a) as 1/R = C i.e.

conductance K = C (l/a) l/a = K/C as l/a is constant called as ‘cell constant’ Cell constant = Specific conductance (ohm-1 cm-1 ) / measured conductance (ohm-1 ) Thus, the unit of cell constant is cm-1 ..

What is conductivity of cell?

Conductivity is measured by using a conductivity cell to make a measurement of the electrical resistance. The simplest kind of measuring cell used consists of two similar electrodes. An alternating voltage applied to one of the conductivity electrodes causes the ions in the solution to migrate towards the electrodes.

What is cell constant in Conductometry?

Leave a reply. 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, where, L- distance between electrodes and A- area of electrode.

What is meant by cell constant?

Cell constant is defined as the ratio of the distance between conductance-titration electrodes to the area of electrodes, measured from the determined resistance of the solution of specific conductance.

What is cell constant formula?

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.

What is cell constant class 12?

Measurement of resistance of a solution of an electrolyte l/A is called cell constant denoted by the symbol, G’. The cell constant depends on the distance between the electrodes (l) and their area of cross-section (A). It is determined by measuringthe resistance of the cell containing a solution of known conductivity.

What is the value of cell constant?

1 = 20 猶/cm. In a simplified approach, the cell constant is defined as the ratio of the distance between the electrodes, d, to the electrode area, A. This however neglects the existence of a fringe-field effect, which affects the electrode area by the amount AR. Therefore K = d/(A + AR).

What is the relation between conductivity and cell constant?

Specific conductivity compensates for variations in conductivity cell geometry by multiplying measured conductivity by a factor called the cell constant. Cell constant (k) is directly proportional to the distance separating the two conductive plates and inversely proportional to their surface area.

Does cell constant depend on temperature?

Cell Constant = Distance between electrodes / Area of the plates of the electrodes. So it is a constant for a battery cell. Conductivity and specific Conductivity is reciprocal of resistance, and is dependent on temperature, electrolyte and concentration.

What is equivalent conductance?

The equivalent conductance of an electrolyte is defined as the conductance of a volume of solution containing one equivalent weight of dissolved substance when placed between two parallel electrodes 1 cm apart, and large enough to contain between them all of the solution.

Why KCl is used in Conductometry?

KCl is used for calibration of conductivity meter because it is very stable. … KCl or potassium chloride is product of reaction between a strong acid and a strong base, so it is strongly bonded because of high electropositive nature of potassium and high electronegative nature of chlorine.

Why KCl is used for determination of cell constant?

Answer. It is generally limited to the measurement of ultrapure water, the conductivity of which is very low. Determination of the cell constant required to convert conductance read- ings into conductivity results. A solution of known conductivity that is used to calibrate the conductivity measuring chain.