We will be closed on August 21 to allow our employees to enjoy the Great American Eclipse.

Vernier Software and Technology
Vernier Software & Technology

Conducting Solutions

Figure from experiment 16 from Physical Science with Vernier

Introduction

In this experiment, you will study the electrical conductivity of water and various water solutions. A solution can contain molecules, ions, or both. Some substances, such as sucrose (C12H22O11), dissolve to give a solution containing mostly molecules. An equation representing the dissolving of sucrose (table sugar) in water is

{{\text{C}}_{{\text{12}}}}{{\text{H}}_{{\text{22}}}}{{\text{O}}_{{\text{11}}}}{\text{(s)}} \to {{\text{C}}_{{\text{12}}}}{{\text{H}}_{{\text{22}}}}{{\text{O}}_{{\text{11}}}}{\text{(aq)}}

Other substances, such as calcium chloride (CaCl2), dissolve in water to produce a solution containing mostly ions. An equation is

{\text{CaC}}{{\text{l}}_{\text{2}}}{\text{(s)}} \to {\text{C}}{{\text{a}}^{{\text{2 + }}}}{\text{(aq)  +  2 C}}{{\text{l}}^{\text{ - }}}{\text{(aq)}}

Objectives

In this experiment, you will

  • Write equations for the dissolving of substances in water.
  • Use a Conductivity Probe to test the electrical conductivity of solutions.
  • Determine which, molecules or ions, are responsible for electrical conductivity of solutions.

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 Physical Science with Vernier »

Experiment 16 from Physical Science with Vernier Lab Book

<em>Physical 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.

Buy the Book

Go to top

We will be closed on August 21 to allow our employees to enjoy the Great American Eclipse.