Measurement of conductivity of solutions

If a solution contains a dissolved substance, its specific conductivity is directly proportional' to the concentration of that substance, so the concentration can be deduced from the conductivity values.

$R=\rho {\frac {l}{q}}$

R = resistance of the conductor during the passage of electricity current, ρ = resistivity (characteristic for conductor material), l = conductor length (electrode distance in the electrolyte), q = conductor cross-section (area size of electrodes)

${\frac {1}{R}}=\kappa {\frac {q}{l}}$

After measuring the resistance of the solution and after experimentally determining the l/q ratio, we can calculate the specific conductivity κ from the relationship.

Links

Related articles

• Current measurement
• Resistance measurement
• Voltage measurement

Source

• KUBATOVA, Senta. Biophoto [online]. [cit. 2011-01-31]. <https://uloz.to/!CM6zAi6z/biofot-doc>.