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Carolina ChemKits®: Molecular Mass of a Volatile Liquid Kit

(in stock)


Grades 9-12. Set against the backdrop of an arson investigation, this guided investigation lets students determine the molecular mass of 2 unknown liquids and identify which is the accelerant from a list of molecular weights. Students use the Dumas method and the ideal gas law to determine the molecular mass of the unknowns. This experiment combines the rigor of a common laboratory technique with the interest of a forensic investigation. Materials are sufficient for 32 students working in pairs.


Shipping Information or Purchase Restrictions
  • Exclamation icon Excepted Quantity - This product is/contains a DOT regulated hazardous material in an excepted quantity. This does not incur a hazardous materials fee. Orders shipping to HI and AK are subject to review and may incur additional shipping charges.
What’s Included:
  • 2 Ethanol, 30 mL
  • 2 2-Propanol, 30 mL
  • 3 Aluminum Foil Sheets
  • 20 Straight Pins
  • 25 Rubber Bands
  • 1 Teacher's Manual with Reproducible Student Guide
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Needed But Not Included:
  • 16 Erlenmeyer Flasks
  • 16 Graduated Cylinders
  • 16 Beakers, 1,000 mL
  • 16 Hot Plates or Bunsen Burners (with ring clamps, stands, wire gauzes and utility clamps)
  • 16 Laboratory Thermometers
  • 32 Universal Clamps
  • 16 1-Hole Stoppers
  •  Labeling Tape
  •  Scissors
  •  Paper Towels
  •  Safety Goggles
  •  Hand Protectors or Heat-Resistant Gloves
  •  Water
  •  Marker
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