Quantities and Reactions : Bonding

Use the Conductivity Sensor to compare the solubility and electrical conductivity of several substances in two different solvents, water and ethanol.

Lab Summary:

In this exploration, students will use a conductivity sensor to compare the solubility and electrical conductivity of several substances in two different solvents, water, and ethanol.

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(student version)

Method:

Use a Conductivity Sensor to the compare the solubility and conductivity of several substances in two different solvents; water and ethanol.

Here's What You Need:

Probeware

• PASPORT Conductivity Sensor (PS-2170)
• Xplorer GLX Graphing Datalogger (PS-2002)
  (or alternate PASPORT interface -- see other options)

Other Materials

• Small Tripod Base & Rod (SE-9451)
• Buret Clamp (SE-9446)
• Balance (SE-8756A)
• Test tube, large
• Test tube rack
• Graduated cylinder, 25-mL
• Scoop or spatula
• Stirring rod
• Wash bottle with waste container
• Benzoic acid, C₇H₆O₂
• Glycerin, C₃H₅(OH)₃
• Hexane, C₆H₁₄
• Potassium iodide, KI
• Potassium sulfate, K₂SO₄
• Sodium thiosulfate, Na₂S₂O₃
• Sucrose, C1₂H₂₂O₁₁
• Ethyl alcohol or ethanol, CH₃CH₂OH
• Water, distilled

Lab Manual:

This activity is included in Explorations in Chemistry (PS-2808), complete with Teacher Information pages, student instructions and handouts, and sample data for a total of 25 probeware-based labs. For your convenience, we offer bundles which provide the probeware necessary for the activities in the manual. For more information on these resources and bundles, click here.