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