Middle School Life Science Teacher Guide


Features 13 core lab activities covering the fundamental concepts of physiology, ecology, plant systems and more

Introduction to Acids and Bases

Lab Summary

Use a pH sensor to measure the pH of several different household chemicals


Working with common household chemicals, students develop an understanding of the pH scale. In this activity, students investigate and observe how red cabbage juice changes color in the presence of acids and bases and relate this visual indicator to the numbers of the pH scale.

Additionally, students will be able to:

Recognize that substances often are placed in categories or groups if they react in similar ways, such as an acid or base

Make explanations and predictions from evidence and drawing logical conclusions

Gain skills and confidence in using a scientific measurement tool—the pH sensor—as well as the spreadsheet and graphing capability of a computer to represent and analyze data


Students gain experience conducting the following procedures:

  • Setting up the equipment and work area to measure the pH of different household chemicals
  • Measuring the pH of several different household chemicals
  • Classifying chemicals as acid, neutral, or base

Sensors / Equipment Used:

PASPORT Chemistry Sensor


Allows students to measure Temperature, pH/ISE/ORP, Absolute Pressure & Voltage in one sensor. For use with PASPORT Interfaces.

Your Bundle Options:

Option 1:

Middle School Life Science Starter Bundle


The equipment bundle for teaching 11 of the 13 Middle School Life Science Teacher Guide's labs.

Option 2:

Middle School Science Standard Sensor Bundle


This bundle contains the probeware needed to perform all 49 lab activities in the Middle School Science through Inquiry lab manual.

Interface Required

This experiment may require software and an interface for data collection.