PASCO ME-6940 Diffusion-Osmosis Apparatus - Manual (Page 7)

M o d e l N o . M E - 6 9 4 0 S a m p l e A c t i v i t y
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Table 3: Concentration
Data Analysis
1. Record the final volume of each solution in Table 1.
2. Calculate the change in volume in each column and record in Table 1.
3. Record the final pressure in the columns in Table 2.
4. Record the 1-2 Differential Pressure in Table 2.
5. Calculate the change in Absolute Pressure 1 and 2. Record in Table 2.
6. Apply a linear fit to the graphs of Absolute Pressure 1 and 2 and record the slopes in Table 2.
7. Apply a linear fit to your graph of 1-2 Differential Pressure and record the slope in Table 2.
Analysis Questions
1. Is the change in fluid volume equivalent on each side of the apparatus? In other words, is the loss of volume on
one side the same as the gain of volume on the other side?
2. Is the change in pressure equivalent on each side of the apparatus? In other words, is the loss of pressure on one
side the same as the gain of pressure on the other side?
3. Calculate the final molarity of the solution in column #2 at the end of the experiment. Record in Table 3.
Solution Initial Concentration (mol/L) Final Concentration (mol/L
Absolute
Pressure 1 Distilled water
Absolute
Pressure 2 2.0 M Sucrose
solution