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... change in liquid level of the acetone (L-Lo) was recorded over a 27 hour period. The change in time per change in liquid level as a function of change in liquid level was then plotted. A linear regression was done on the data to produce an equation for a line that fit the data. The slope of the linear regression was used to calculate the acetone diffusion coefficient. The diffusion coefficient for the 2M NaCl solution was determined by placing the solution in a cell that contained 121 capillaries. The cell was placed in a vessel that contained one liter of de-ionized water and stirred continuously. The conductivity was then measured at 10 second intervals for 1800 seconds. A plot of conductivity versus time was obtained, and a linear regression of the data was done. The slope from the linear regression was used to calculate the liquid diffusion coefficient. The diffusion coefficient ...