Vernier Software and Technology
Vernier Software & Technology

Diffusion: How Fast?

Figure from experiment 21 from Middle School Science with Vernier

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 Vernier sensors and equipment.

Option 1

Option 2

Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

Standards Correlations

See all standards correlations for Middle School Science with Vernier »

Experiment 21 from Middle School Science with Vernier Lab Book

<em>Middle School Science with Vernier</em> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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