An Analytic Expression for the Dependence of the Apparent Acid Constant on the Degree of Dissociation of Surface Silanol Groups of Silica with Different Sizes |
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| Authors: | Genxiang Luo Haoping Wang |
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| Affiliation: | 1. Department of Chemistry , School of Chemistry and Materials Science, Liaoning Shihua University , P. R. China genxiangluo@yahoo.com.cn;3. Department of Chemistry , School of Chemistry and Materials Science, Liaoning Shihua University , P. R. China |
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| Abstract: | Using the surface charge density/surface potential relationship for a spherical colloidal particle with high surface potential, a simple expression for the relationship of the apparent acid constant with the degree of dissociation of surface silanol groups of silica with different sizes is derived. The present formula has good agreement with literature values and is quite simple for practical use. |
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| Keywords: | Apparent acid constant degree of dissociation Poisson-Boltzmann equation silica |
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