Lab 3 Colligative Properties

Lab 3 Colligative Properties - Chem 125 Dr. Nguyen Name:...

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Chem 125 Dr. Nguyen Name: Roman Ferro Computer #: 18 Partner : Tony Atchely and Taylor Brady Colligative Properties of Solutions: Freezing Point Depression Part 1: Determination of Freezing Point of Pure Water ( 1 pt ) Freezing Point of Pure, Deionized Water: ______0 _____°C Part 2: Determination of Freezing Points of Known Solutions ( 0.5 pt ) Name & Formula of Solution Investigated: Sodium Nitrate (NaNO3) ( 0.5 pt ) Molality of Solution Investigated: .206 m NaNO3 In the space below, show how you calculated the molality of the solution your group investigated. ( 1 pt ) In the table below, record the results of your freezing point measurements for the solution your group investigated. Title this table (in the space below) and use units where appropriate. ( 3 pts ) Freezing Point Depression (NaNO3) Trial No. Freezing Point (°C) T f 1 -.87 -.87 2 -.75 -.75 3 -.82 -.82 Average T f .80 In the table below, record the names of the solutions and average T f for the solutions analyzed by your
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group and your peers. Calculate the molalities and the van’t Hoff factor (both theoretically and
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This note was uploaded on 11/14/2011 for the course CHEM 125 taught by Professor Retsek during the Fall '08 term at Cal Poly.

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Lab 3 Colligative Properties - Chem 125 Dr. Nguyen Name:...

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