Conductivity of Saltwater: The Effect of Concentration
Recommended for Middle School through High School.
If an ionic solid is dissolved in water, ions are released and the resulting solution will conduct electricity. Dissolving solid sodium chloride (table salt) in water releases ions according to the equation
In this experiment, you will study the effect on electrical conductivity of increasing sodium chloride concentration. Electrical conductivity will be measured as the ion concentration of the solution being monitored is gradually increased by the addition of concentrated NaCl drops. A Conductivity Probe, attached to a computer, will be used to measure electrical conductivity. Conductivity is measured in microsiemens (μS/cm).
In this experiment, you will
Graph this data.
Use the data and graph to make conclusions about conductivity.
Sensors and Equipment
This experiment features the following Vernier sensors and equipment.