Amino acid hydration in aqueous ammoniu chloride and sodium chloride solutions |
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Authors: | V P Korolev |
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Institution: | 1. G. A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia
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Abstract: | Partial volumes $\bar V^0$ of amino acids in aqueous NH4Cl and NaCl solutions are discussed. The salts have different effects on water structure. The contributions of the charged NH 3 + and COO? groups of amino acids are found. Structural characteristics of hydrated complexes are calculated: partial volumes of water inside and outside the hydration sphere and hydration numbers. The same value of $\bar V^0$ (NH 3 + , COO?) is achieved at a higher NH4Cl concentration. The two salt systems with the same $\bar V^0$ (NH 3 + , COO?) have similar values of the partial volumes of water and hydration numbers. |
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