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How Temperature Affects Solubility

How Temperature Affects Solubility


The Stainless Steel Temperature Probe is a rugged, general-purpose temperature sensor that can be used in organic liquids, salt solutions, acids, and bases.  Use it as you would use a thermometer for experiments in chemistry, physics, biology, Earth science, and environmental science.

In this laboratory experiment, your students will study how temperature plays an affect on solubility.  Using different amounts of potassium nitrate, students will heat the solvent until all solute dissolves.  After obtaining their data, a solubility chart for potassium nitrate will be graphed.  


    This U-PIK will include enough materials for eight student groups.  Suggested group size is 2-3 students.  The U-PIK will include the following:


    • 8 temperature sensors 
    • 8 LabQuest 2 interfaces
    • 8 400-mL beakers
    • 8 250-mL beakers
    • 8 ring stands
    • 32 20x150 test tubes
    • 8 test tube racks
    • 8 hot plates
    • 8 10-mL graduated cylinders
    • 16 utility clamps
    • 8 stirring rods
    • potassium nitrate


    You will be required to provide the water needed for the laboratory experiment.  Tap water will be suitable for this process.  


    The temperature sensor will allow you to monitor temperature changes and how it affects the solubility of a salt.  This laboratory can be introduced after students become aware of the process of dissolving and the role temperature plays.    


    No mathematical concepts are required for this laboratory procedure.  The teacher may instruct students to produce a graphical representation of their data (either by hand or by Excel).  Due to the concepts presented, the laboratory can be implemented at the middle school level.  It is best suited in a general science, earth science, environmental science, or physical science classroom.  


    Time:  One laboratory period.  


    Student Level:  

    BEGINNER (Grades 5-12)

  • Temperature Sensor User Manual

  • Lab Experiment: Preview Document

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