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.

Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle 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)

Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \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>.