Activity Detail
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Electrolytes: Which Liquid Produces the Most Volts?
 


Activity Overview

In this activity, students' will use a Voltage Sensor to measure the voltage produced by an electrolyte. They will understand that acids and bases are electrolytes and compare voltages of acids to the voltages of bases. Students' will test liquid and determine if they are acids, neutrals, or bases.

Before the Activity

  • Connect the TI-73 Explorer™ to the CBL™ unit
  • Connect the voltage sensor to Channel 1 in the CBL™ unit
  • Download DataMate™ program
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 41 - 46 from the attached PDF file for your class

    		•

    		During the Activity

    		Distribute the pages to your class.
  • Complete the Hypothesis section on the Data Collection and Analysis page and based on the pH value predict which acid and base will produce the highest voltage


    • Follow the Activity procedures:
  • Put the test liquid in a container
  • Place the electrodes in the liquid
  • Attach the black and red leads to the electrodes
  • Measure the voltage of the electrolyte
  • Measure the voltage for the other sample liquids
  • Repeat the activity using different combiations of electrodes
  • Identify the liquid that produced the highest voltage

    		After the Activity

    		Students' will complete Student Data Collection and Analysis Sheet.

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

    		Other Downloads




    view standards alignment
    view textbook alignment

    Subject Area:
    Science : Physical Science : Acids and Bases
    Science : Middle Grades Science : Energy

    Author:
    Texas Instruments

    Level:
    5-8

    Activity Time:
    60 Minutes

    Device:
    TI-73 Explorer™

    Apps:
    DataMate

    Software:
    TI Connect™

    Accessories:
    CBL™/CBL 2™, Sensor - Voltage, TI Connectivity Cable, TI-GRAPH LINK™ Cable, Unit-to-Unit link cables

    Other:
    This is Activity 5 from the EXPLORATIONS Book:
    Activities for Middle Grades Science with the CBL 2™ and TI-73.

    The following materials are required for this activity:

  • Electrolyte (liquid samples
  • Liquid containers (50 ml beakers)
  • Electrodes(2 inch copper and 2 inch magnesium strips)
  • Distilled water for rinse water
  • Beaker or container for rinse water
  • Wires and alligator clips


    • Report an issue with this activity