At a definite temperature, a conductivity cell is filled with 0.02 (N) KCl solution, the resistance is 380 ohm. If the specific conductance of 0.02(N) KCl solution at the same temperature be `"0.002758 ohm.cm"^(-1)`. Find the cell constant. If the distance between the electrodes is 0.80 cm, what is the average area of the electrodes?

Explanation

`(1)/(R)=kappaxx(A)/(l)" "therefore" "(1)/(380)=0.002758xx(A)/(l)` or,
`(l)/(A)="1.04804 cm"^(-1)`
`therefore" "A=(0.8)/(1.04804)="0.7633 cm"^(2)`