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Household Acids and Bases

Figure from experiment 28 from Physical Science with Vernier

Introduction

Many common household solutions contain acids and bases. Acid-base indicators, such as litmus and red cabbage juice, turn different colors in acidic and basic solutions. They can, therefore, be used to show if a solution is acidic or basic. An acid turns blue litmus paper red, and a base turns red litmus paper blue. The acidity of a solution can be expressed using the pH scale. Acidic solutions have pH values less than 7, basic solutions have pH values greater than 7, and neutral solutions have pH equal to 7.

Objectives

In this experiment, you will

  • Test household solutions with litmus paper.
  • Test household solutions using red-cabbage juice indicator.
  • Determine the pH values of household solutions.
  • Classify household substances as acids or bases.
  • Determine the different red cabbage juice indicator colors over the entire pH range.
  • Use red cabbage juice indicator to test other household substances.

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 28 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.

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