The Capillary Method

Paper Summary:

This paper is a technical report on a laboratory experiment on surface tension measurements using the capillary rise method. Samples are deionized water and varying concentrations of NaCl and of HOAc. Calculations are included in the appendix.

From the Paper:

"Increasing concentrations of HOAc solutions tend to lower surface tension of water, while NaCl solutions increase surface tension of water. The former results to a condition called positive surface concentration, where the solute tend to concentrate slightly in the neighborhood of the surface; the latter is due to negative surface concentration, where the solute molecules become less concentrated in the neighborhood of the surface."

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