{"title":"25 °C 下的磷酸二氢钾和琥珀酸钠缓冲溶液。","authors":"Maya Paabo, Roger G Bates, Robert A Robinson","doi":"10.6028/jres.067A.055","DOIUrl":null,"url":null,"abstract":"<p><p>A buffer mixture consisting of equal molalities (<i>m</i>) of potassium dihydrogen phosphate and sodium succinate is proposed as a useful reference point in the study of acid-base equilibria, bridging the present gap between <i>p</i>H 5.5 and <i>p</i>H 6.8. The <i>p</i>(a<sub>H</sub> <i>γ</i> <sub>Cl</sub>) at 25 °C has been determined by electromotive-force measurements for five buffer solutions in which <i>m</i> varied from 0.005 to 0.025. The conventional <i>pa</i> <sub>H</sub> of each solution has been derived and found to be in good agreement with that calculated from existing data for the two equilibria concerned. The <i>pa</i> <sub>H</sub> varies from 6.251 at <i>m</i>=0.005 to 6.109 at <i>m</i>= 0.025. The buffer mixture has been used successfully for the determination of the dissociation constants of 2-nitro-4-chlorophenol and 2,6-dichlorophenol.</p>","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1963-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322773/pdf/","citationCount":"0","resultStr":"{\"title\":\"Buffer Solutions of Potassium Dihydrogen Phosphate and Sodium Succinate at 25 °C.\",\"authors\":\"Maya Paabo, Roger G Bates, Robert A Robinson\",\"doi\":\"10.6028/jres.067A.055\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>A buffer mixture consisting of equal molalities (<i>m</i>) of potassium dihydrogen phosphate and sodium succinate is proposed as a useful reference point in the study of acid-base equilibria, bridging the present gap between <i>p</i>H 5.5 and <i>p</i>H 6.8. The <i>p</i>(a<sub>H</sub> <i>γ</i> <sub>Cl</sub>) at 25 °C has been determined by electromotive-force measurements for five buffer solutions in which <i>m</i> varied from 0.005 to 0.025. The conventional <i>pa</i> <sub>H</sub> of each solution has been derived and found to be in good agreement with that calculated from existing data for the two equilibria concerned. The <i>pa</i> <sub>H</sub> varies from 6.251 at <i>m</i>=0.005 to 6.109 at <i>m</i>= 0.025. The buffer mixture has been used successfully for the determination of the dissociation constants of 2-nitro-4-chlorophenol and 2,6-dichlorophenol.</p>\",\"PeriodicalId\":94340,\"journal\":{\"name\":\"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1963-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322773/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.6028/jres.067A.055\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"1963/12/1 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.6028/jres.067A.055","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"1963/12/1 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
我们提出了一种由等摩尔（m）磷酸二氢钾和琥珀酸钠组成的缓冲混合物，作为研究酸碱平衡的有用参考点，弥补了目前 pH 5.5 和 pH 6.8 之间的差距。在 25 °C 时的 p(aH γ Cl) 是通过测量五种缓冲溶液的电动力测定的，其中 m 在 0.005 至 0.025 之间变化。得出了每种溶液的常规 pa H，并发现其与根据现有数据计算出的两种相关平衡的 pa H 非常一致。pa H 从 m=0.005 时的 6.251 到 m=0.025 时的 6.109 不等。该缓冲混合物已成功用于测定 2-硝基-4-氯苯酚和 2,6-二氯苯酚的解离常数。
Buffer Solutions of Potassium Dihydrogen Phosphate and Sodium Succinate at 25 °C.
A buffer mixture consisting of equal molalities (m) of potassium dihydrogen phosphate and sodium succinate is proposed as a useful reference point in the study of acid-base equilibria, bridging the present gap between pH 5.5 and pH 6.8. The p(aHγCl) at 25 °C has been determined by electromotive-force measurements for five buffer solutions in which m varied from 0.005 to 0.025. The conventional paH of each solution has been derived and found to be in good agreement with that calculated from existing data for the two equilibria concerned. The paH varies from 6.251 at m=0.005 to 6.109 at m= 0.025. The buffer mixture has been used successfully for the determination of the dissociation constants of 2-nitro-4-chlorophenol and 2,6-dichlorophenol.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
