Introduction
Diffusion is a process that allows particles to move from where they are more concentrated to where they are less concentrated. This process allows particles to move through a cell membrane. Diffusion enables cells to get food and get rid of waste.
A Conductivity Probe can measure the concentration of ions in a solution. A salt solution contains ions. In this experiment, you will use a Conductivity Probe to measure the diffusion of salt through a membrane. You will also study the effect of salt concentration on diffusion rate.
Objectives
- Measure conductivity.
- Measure the diffusion of salt through a membrane.
- See the effect of salt concentration on diffusion rate.
Sensors and Equipment
This experiment features the following sensors and equipment. Additional equipment may be required.
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This experiment is #5 of Exploring Life Science. The experiment in the book includes student instructions as well as instructor information for set up, helpful hints, and sample graphs and data.
