Lab 1: Colligative Properties & Osmotic Pressure Essay

1696 Words Oct 25th, 2011 7 Pages
Ankur Sindhu Sep 20, 2011 CHEM 182-DL1
Prof.: Dr. Nidhal Marashi

Lab 1: Colligative Properties & Osmotic Pressure

Purpose: The purpose of this laboratory was to gain an understanding of the differences between the freezing points of pure solvent to that of a solvent in a solution with a nonvolatile solute, and to compare the two.

Secondly, osmosis was to be observed to gain a proper understanding of how the principal of dialysis functions.

Procedure:

1. Make a water bath assembly by doing the following: a. Half-fill the 100-mL beaker with cool tap water. b. Place crushed ice in the beaker so the water level is just below the top of the a. beaker. The water level should not be
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The lid was then placed on the jar and an observation was made and recorded. Observations of the egg were then made after 12 hours and 24 hours had passed and the observations were recorded. After 24 hours had passed, the egg was removed from the syrup and rinsed with tap water and observations were made and recorded.

Data Tables and Graphs:

Temperature of Distilled Pure Water

Time | Temperature (C) | 0 | 1 | 30 | -1 | 60 | -1 | 90 | -1 | 120 | -1 | 150 | -1 |

Temperature of Salt Water Solution

Time (s) | Temperature (C) | 0 | 0 | 30 | 8 | 60 | 5 | 90 | 2 | 120 | 0 | 150 | 0 |

Part 2.
Osmosis Observations of Syrup Filled Dialysis Tubing

0 Hours | Tubing limp and filled ⅓ of way with syrup | 1 Hours | Tubing appears to have accumulated more liquid inside. Still a little limp | 2 Hours | Tubing is now half filled with liquid and is more stiff | 3 Hours | Tubing is ¾ of the way filled with liquid and is very stiff | 4 Hours | Tubing is almost completely full of liquid and very stiff | 5 Hours | Rubber band at one of the end of the tubing has come off |

Observations of Raw Egg

Time | Raw Egg | Raw Egg in Vinegar | Raw Egg in Syrup | Raw Egg Rinsed off with tap water | 0 Hours | Oval shaped, white, opaque and hard shelled | Oval shaped, white, opaque, bubbles rising out of vinegar | Oval shaped, large, translucent yellow, no shell | Still soft and small and

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