@article{oai:kobe-c.repo.nii.ac.jp:00005684,
 author = {中川, 徹夫 and NAKAGAWA, Testuo},
 issue = {2},
 journal = {神戸女学院大学論集, KOBE COLLEGE STUDIES},
 month = {Dec},
 note = {我々はすでに二成分系溶液における4種類の濃度間、3種類のコンテント間、3種類の分率間および3種類の比間の関係について検討し、これらに関する相互変換式を得た。本研究では、継続して濃度－コンテントおよび濃度－分率間の相互変換式を系統的に誘導した。誘導した式の有効性を検証するため、エタノールの質量分率が0.500のエタノール水溶液を例にとり、この値をモル濃度、数濃度、質量濃度、および体積濃度へ、さらに、エタノールのモル分率0.281および体積分率0.558（いずれも質量分率0.500に相当）を、モル濃度へ変換した。相互変換式を用いて算出した組成の値は元の値と有効数字3桁で一致した。それゆえ、相互変換式は、溶液科学の定量的な研究や高等学校や大学で化学を指導する際に有用であろう。, We have already investigated relations among four concentrations, three contents, three fractions, and three ratios in binary solutions, and obtained their interconversion equations. In this study, successively, we have systematically derived the interconversion equations in concentrations–contents and concentration–fractions in binary solutions. In order to examine their validity, we have selected an aqueous ethanol solution whose mass fraction of ethanol is 0.500 as a sample, and converted this value to the four concentrations such as molar, number, mass, and volume concentrations, and 0.281 mole and 0.558 volume fractions of ethanol, both of which are 0.500 mass fraction of ethanol, to the molar concentration. All composition values estimated using the interconversion equations are in agreement with the original ones within three significant figures. Therefore, these equations will be useful for investigating quantitative solution science and teaching chemistry to high school and university students.},
 pages = {51--62},
 title = {二成分系溶液の組成とそれらの相互変換式に関する再検討（２）―濃度－コンテントおよび濃度－分率の相互変換―},
 volume = {66},
 year = {2019},
 yomi = {ナカガワ, テツオ}
}