INTERACTIONS IN AQUEOUS NONELECTROLYTE SOLUTIONS .I. SOLUTE-SOLVENT EQUILIBRIA
INTERACTIONS IN AQUEOUS NONELECTROLYTE SOLUTIONS .I. SOLUTE-SOLVENT EQUILIBRIA
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DOI：
10.1021/j100879a010
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发表时间：
1966-01-01
影响因子：
--
通讯作者：
ROBINSON, RA
中科院分区：
文献类型：
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作者：
STOKES, RH;ROBINSON, RA
溶质通过一系列的溶剂化平衡与溶剂相互作用，形成根据理想溶液定律混合的物质。给出了溶剂活度与摩尔浓度和平衡常数的关系式。蔗糖溶液可以相当精确地描述，只要假设溶质分子中氧原子的数目等于若干个可能的溶剂化位点，每个位点都有一个相同的平衡常数。符合这一模型的几种溶质的混合溶液，在分离溶质和混合溶质溶液的等静力平衡时，均服从非常简单的摩尔浓度方程。给出了活度系数之间的类似关系。文中给出了符合这种混合关系的体系的例子，并认为与这种关系有较大偏差的体系可以作为特定溶质-溶质相互作用的证据。
Solutes which interact with the solvent by a series of solvation equilibria to form species which mix according to the ideal solution law are considered. General expressions relating the solvent activity to the molality and the equilibrium constants are given. Sucrose solutions can be described with considerable accuracy by theassumption of a number of possible solvation sites equal to the number of oxygen atoms in the solute molecule, with a single equilibrium constant given the same value for each site. Mixed solutions ofseveral solutes conforming to this model are shown to obey very simple equations relating the molalities at isopiestic equilibrium between solutions of the separate and mixed solutes. A similar relation between the activity coefficients is given. Examples of systems which conform to these mixture relations are given, and it is suggested that cases of large departures from the relation may be taken as evidence of specific solute-solute interaction.