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

In this experiment, you will

  • Measure conductivity.
  • Measure the diffusion of salt through a membrane.
  • See the effect of salt concentration on diffusion rate.