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In summary, the result of the experiment shows that adding acetic acid to water will decrease the surface tension of water. As more acetic acid is added (increased concentration), surface tension will decrease even more.
Member rating: No Rating | Words: | Submitted: Tue Jun 20 2006
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MEASURING SURFACE TENSION OF AQUEOUS SOLUTIONS BY THE CAPILLARY RISE METHOD University of the Philippines, Diliman Department of Mining, Metallurgical and Materials Engineering College of Engineering ABSTRACT The capillary rise method was used to measure the surface tension of aqueous solutions of sodium chloride and acetic acid. Molar concentrations of 0.5 M and 1.0 M for each solution were tested. The results were then compared to the surface tension of pure water to observe how solute properties affect the surface tension of water. The experimental results showed that adding acetic acid solute in water lowers the surface tension of water. As the concentration of acetic acid was increased, the surface tension of water decreased even more. However, the experiment has failed to accurately show the effect of sodium chloride solutes on the surface tension of water. Nevertheless, previous studies revealed that surface tension of electrolyte solutions, such as NaCl solution, increase with increasing concentration. The...
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