Gerasimov I G
Biofizika. 2007 Jan-Feb;52(1):69-74.
Literature data on the atomic and ionic sizes of sodium (Na+) and potassium (K+), and the thermodynamic, and physicochemical characteristics of solutions containing Na+ and K+ have been compared. It was shown that in solutions containing Na+ only the activity of H+ is 1.31 +/- 0.038 times higher than in solutions containing only K+. It was concluded that there is reason to believe that the stoichiometry of Na+/K(+)-exchange is close to 3:4. The different degree of hydratation of Na+ and K+ caused by different density of their charges is considered to be the main reason for the result obtained.
已对有关钠（Na+）和钾（K+）的原子及离子大小，以及含有Na+和K+的溶液的热力学和物理化学特性的文献数据进行了比较。结果表明，在仅含Na+的溶液中，H+的活性比仅含K+的溶液高1.31±0.038倍。得出的结论是，有理由相信Na+/K(+)-交换的化学计量比接近3:4。由Na+和K+电荷密度不同导致的不同水化程度被认为是获得该结果的主要原因。
