Conductivity of Aqueous Solutions

Figure from experiment 4 from Investigating Chemistry through Inquiry

Introduction

In this experiment, you will investigate some properties of strong electrolytes, weak electrolytes, and nonelectrolytes by observing the behavior of these substances in aqueous solution. You will investigate these properties using a Conductivity Probe. When the probe is placed in a solution that contains ions, and thus has the ability to conduct electricity, an electrical circuit is completed across the electrodes that are located on either side of the hole near the bottom of the probe body, and this produces a conductivity reading. The unit of conductivity used in this experiment is the microsiemens per centimeter, or ┬ÁS/cm.

Objectives

In the Preliminary Activity, you will gain experience using a Conductivity Probe and data- collection software. You will first measure the conductivity of distilled water, and then, after adding NaCl solid to the distilled water, you will measure the conductivity of the resulting NaCl solution.

After completing the Preliminary Activity, you will first use reference sources to find out more about electrolytes and the electrical properties of aqueous solutions before you choose and investigate a researchable question dealing with the conductivity of aqueous solutions.

Sensors and Equipment

This investigation requires each of the following Vernier sensors and equipment (unless otherwise noted):

Additional Requirements

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

Download Experiment Preview

The student-version preview includes:

  • Step-by-step instructions for the Preliminary Activity
  • List of materials and equipment

Note: The experiment preview of the Preliminary Activity does not include essential teacher information, safety tips, or sample data. Instructions for Logger Pro and other software (such as LabQuest App or TI handheld software, where available) are on the CD that accompanies the book. We strongly recommend that you purchase the book before performing experiments.

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Standards Correlations

See all standards correlations for Investigating Chemistry through Inquiry »

Experiment 4 from Investigating Chemistry through Inquiry Lab Book

<em>Investigating Chemistry through Inquiry</em> book cover

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