Education Technology

# Activities

• ##### 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

6-8

60 Minutes

• ##### Device
• TI-73 Explorer™

TI Connect™

• ##### Accessories

CBL™/CBL 2™
Sensor - pH
TI Connectivity Cable

• ##### 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

## 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