A simple and low cost set up for surface tension measurement of highly viscous liquids. | [Journal of Chemical Society of Pakistan • 2003]

Author(s):

1. A. R. Solangi: Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan

2. A. W. K. Khanzada: Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan

Abstract:

A simple and low-cost set up has been described for measurement of surface tension of highly viscous liquids by drop-weight method. The set-up has been described in literature for normal liquids. Data in terms of V/R3 and corresponding factor F are given in literature for normal liquids. An equation has been developed between V/R3 versus a factor F by polynomial regression using EXCELL-2000 spreadsheet software in Window-98. Here V is volume of drop of liquid passing through a tube of radius R. The tube of 3mm internal diameter has been used and this diameter has been measured by a vernier caliper. The setup has been applied to glycerol and the results are accurate within 2.5% of literature values obtained by this simple setup. Further this apparatus has been used in determination of viscosity of commercial highly-viscosity unknown liquids. The results are reproducible. This simple apparatus can be used in Physical Chemistry practicals, with the help of the cubic equation found from EXCEL-2000 software.

Page(s): 8-11

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 25, Issue: 1, Year: 2003

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