Activity Detail
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Beverage Tests
 


Activity Overview

Students determine the pH of liquid samples. They get familiar with the pH scale, create graphs comparing pH levels, and compare data displayed as a scatter plot, a boxplot, a histogram, and a bar graph.

Before the Activity

  • Use TI Connect™ to download Vernier EasyData™ application
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 135 - 144 from the attached PDF file for the class
  • Connect Vernier EasyLink™ interface to the calculator and pH sensor
  • Set up the calculator for data collection

    		•

    		During the Activity

    		Distribute the pages to the class.

    Follow the Activity procedures:
  • Place the pH sensor probe in distilled water and measure the pH of water
  • Place the probe in the second sample and record the pH
  • Rinse pH sensor with distilled water before using it for the next reading
  • Record the pH of the other samples
  • View the scatter plot for the data
  • Set a line in the graph at pH 7 and notice where the beverage's pH are placed in comparison to it
  • Compare the predicted pH description with the actual pH description
  • Graph the pH data in the form of a box-and-whisker plot and compare pH of beverages
  • Find the mean and median values
  • Plot pH data as histograms, label the graph, and compare the pH values of the beverages

    		After the Activity

  • Students analyze the results and answer the case analysis questions on the student worksheet.
  • Review student results
  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary

    		Other Downloads




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    Subject Area:
    Science : Chemistry : Acids, Bases, and Salts

    Author:
    Texas Instruments

    Level:
    9-12

    Activity Time:
    60 Minutes

    Device:
    TI-83 Plus Family, TI-84 Plus Family

    Apps:
    EasyData™

    Software:
    TI Connect™

    Accessories:
    TI Connectivity Cable, Unit-to-Unit link cables, Sensor - pH

    Other:
    This is Activity 15 from the EXPLORATIONS Book:
    EasyData Activities: Modeling Algebraic Functions with Data Collection Activities.

    The following materials are required for this activity:

  • Distilled water to rinse sensor
  • Beaker to collect wash liquid
  • Beverage samples


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