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Determination of Molar Mass by Vapor Density Kit for AP® Chemistry

Item # 840509

Meets AP® Chemistry experiment 3. This kit uses the classic Dumas method to determine molar mass. Students vaporize an unknown volatile liquid in a flask and measure the mass of the condensed vapor in the flask after cooling. They then measure the flask volume, room temperature, and room pressure. Students use the data and the ideal gas law to calculate the molar mass of the volatile liquid and calculate the percent error against the true value. Kit includes 2 unknown volatile liquids to test.

Price

$18.50

In stock and available to ship.

Meets AP® Chemistry experiment 3. This kit uses the classic Dumas method to determine molar mass. Students vaporize an unknown volatile liquid in a flask and measure the mass of the condensed vapor in the flask after cooling. They then measure the flask volume, room temperature, and room pressure. Students use the data and the ideal gas law to calculate the molar mass of the volatile liquid and calculate the percent error against the true value. Kit includes 2 unknown volatile liquids to test.

AP® is a trademark registered and/or owned by the College Board®, which was not involved in the production of, and does not endorse, this product.

   This item is sold and shipped to schools and businesses only. Not available to individuals or residential addresses. For substitution suggestions, please call us at 800.334.5551 (8am to 8pm, ET, Monday-Friday).

  • Limited Qty: Flammable Liquid - This product is/contains a limited quantity of a DOT regulated hazardous material. This item will not incur a hazmat fee when shipped by ground. Orders shipping to HI and AK are subject to review and may incur additional shipping charges.
  • This item is sold and shipped to schools and businesses only. Not available to individuals or residential addresses. Visit our Login & Registration page to learn how to create a Login and link it to an approved school or business account.
 

Materials are sufficient for 30 students working in groups of 3.

Components Qty Included?
Ethanol, Denatured, 30 mL 1 Included
2-propanol, 100%, 30 mL 1 Included
Aluminum Foil, 12 x 15 in 3 Included
Pins 30 Included
Teacher's Manual and Reproducible Student Guide 1 Included
Erlenmeyer Flasks, 250 mL 10 Needed, Not included
Beakers, 1000 mL 10 Needed, Not included
Graduated Cylinders, 10 mL 10 Needed, Not included
Graduated Cylinders, 100 mL 10 Needed, Not included
Utility Clamps 10 Needed, Not included
Thermometers 10 Needed, Not included
Ring Stands 10 Needed, Not included
Hot Plates 10 Needed, Not included
Heat Resistant Gloves 10 Needed, Not included
Balance (accurate to 0.01 g) Needed, Not included
Distilled Water Needed, Not included
Paper Towels Needed, Not included
Labeling Tape Needed, Not included
Markers Needed, Not included

Correlations to State Standards

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