Education Technology

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  • Subject Area

    • Science: Physical Science: Acids and Bases
    • Math: Algebra I: Data Analysis
    • Math: Middle Grades Math: Statistics and Probability
    • Math: PreAlgebra: Probability, Statistics and Data Analysis

  • Author

    Texas Instruments

  • Level


  • Activity Time

    60 Minutes

  • Device
    • TI-73 Explorer™
  • Software

    TI Connect™

  • Applications
  • Accessories

    CBL™/CBL 2™
    Sensor - pH
    TI Connectivity Cable
    TI-GRAPH LINK™ Cable
    Unit-to-Unit link cables

  • Other Materials
      This is Activity 1 from the EXPLORATIONS Book:
      Activities for Middle Grades Science with the CBL 2™ and TI-73.

      The following materials are required for this activity:
    • Distilled water
    • Beaker
    • Beverage samples
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Beverage Tests

Activity Overview

In this activity, students' will use a pH sensor to determine the pH of common beverages. They will use the data to create different types of graphs. Students also learn to classify liquids and identify an unknown sample.

Before the Activity

  • Connect the TI-73 to the CBL 2 unit
  • Connect the pH sensor to Channel 1 in the CBL 2 unit
  • Download TI-GRAPH LINK™ or TI Connect™ to analyze data on the computer
  • Start the DataMate™ program
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 1 - 11 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to your class.

    Follow the Activity procedures:

  • Place the pH sensor in the beverage sample
  • Note the pH value
  • Repeat the experiment with the remaining beverage samples
  • Record the pH value for each sample
  • Use the data to plot a bar graph, scatter plot and a circle graph
  • Classify the liquids as acids, neutrals, and bases
  • Identify the unknown sample by its pH value
  • After the Activity

    Students' will complete the Data Collection and Analysis Sheet and answer questions listed in it.

    Review student results

  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary