freezing pt depression lab

freezing pt depression lab - Chem 125 Name: Dr. Abel Olivia...

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Dr. Abel Name: Olivia Nixon Lab Day and Time: Tuesday 8am Partner(s): Experiment 3: Colligative Properties of Solutions: Freezing Point Depression Instructions: Each person is to submit an individual report, due at the beginning of lab week 5. You must turn in a typed hard copy of this report. Part 1: Determination of Freezing Point of Pure Water Freezing Point of Pure, Deionized Water: .87 °C Part 2: Determination of Freezing Points of Known Solutions Name of Solution Investigated: NaNO 3 Molality of Solution Investigated: .0994m In the space below, show how you calculated the molality of the solution you investigated. In the table below, record the results of your freezing point measurements for the solution you investigated. Title this table (in the space below) and use units where appropriate. Freezing Point of Sodium Nitrate Trial No. Freezing Point (°C) T f (°C) 1 -.57 1.44 2 -.34 1.21 3 -.42 1.29 Average T f 1.31 In the table below, record the names of the solutions and average T f for the solutions analyzed by your peers. Calculate the molalities and the van’t Hoff factor (both theoretically and experimentally). Title this table (in the space below) and use units where appropriate. Properties of Solutions
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This note was uploaded on 12/05/2011 for the course CHEM 125 taught by Professor Retsek during the Winter '08 term at Cal Poly.

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freezing pt depression lab - Chem 125 Name: Dr. Abel Olivia...

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