Lab 5 Essay

684 WordsJul 16, 20143 Pages
Colligative Properties & Osmotic Pressure Peter Jeschofnig, Ph.D. Version 42-0149-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate student’s writing of lab reports by providing this information in an editable file which can be sent to an instructor Observations & Questions for Part 1 Data Table 1: Pure Water and Salt Solution Seconds Distilled H20 Room temp Distilled H20 Ice bath Saltwater Room temp Saltwater Ice bath 0 21° C 21° C 20° C 20° C 30 5° C 10° C 60 4° C 5° C 90 3° C 4° C 120 2° C 1° C 150 1° C 0° C 180 0° C 0° C 210 -1° C 0° C 240 -1° C 0° C 270 0° C 0° C 300 0° C 0° C 330 0° C 0° C Record your observations and your time and temperature data in tables. Use one table for the pure water and one table for the salt solution. Make two graphs of your data. On one graph plot the data from the pure water. On the other graph plot the data from the salt solution. On both plot temperature on the y-axis and time on the x-axis. A. Record the freezing point of the pure water and the freezing point of the salt solution. B. How do these two freezing points compare? C. What are some practical applications of freezing point depression, boiling point elevation, and vapor pressure lowering? Questions - Part 2 A. To what biological structure is the dialysis bag comparable? How is it

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