液体表面张力系数与浓度的关系实验研究

Study on the relationship between liquid surface tension and concentration

为探究液体表面张力与液体浓度的关系,利用压阻式力敏传感器,采用拉脱法,测试室温下水及不同浓度的蔗糖水、盐水、酒精、肥皂水的表面张力系数。实验结果表明:蔗糖水和盐水的表面张力系数随浓度的增大而增加,而酒精、肥皂水的表面张力系数随浓度的增大而减小。

In order to explore the relationship between the surface tension of the liquid and the liquid concentration, surface tension coefficient in water at room temperature, different concentrations of sugar water, salt water, alcohol, as well as soap water were measured by using a piezoresistive force sensor and the pull-out method. By analyzing experimental data, coefficient of surface tension of aqueous sucrose and salt water increases with increasing concentration, while coefficient of surface tension of alcohol, soap water decreased when the concentration increased.