Electrochemistry

The cell constant tells us about the cell's design and size. It can be found by using the known conductivity and resistance of 0.1 M KCl solution.
G⋆=κ⋅R
So, G⋆=1.29×100=129m−1 or 1.29cm−1
Step 2: Calculate the conductivity ( κ ) for 0.02MKCl solution
We use the cell constant and the new measured resistance for the 0.02 M solution.
κ=‌

G⋆

R

=‌

1.29

520

=0.00248Sm−1
Step 3: Find the molar conductivity ( Λm )
Molar conductivity shows how well ions move in a solution. Use this formula:
Λm‌=‌

κ×1000

C

Λm‌=‌

0.00248×1000

0.02

‌=124Scm2mol−1