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Experiments​

Diffusion: How Fast?

Experiment #21 from Middle School Science with Vernier

Education Level
Middle School

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.

Sensors and Equipment

This experiment features the following sensors and equipment. Additional equipment may be required.

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Purchase the Lab Book

This experiment is #21 of Middle School Science with Vernier. The experiment in the book includes student instructions as well as instructor information for set up, helpful hints, and sample graphs and data.

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