| 弱酸HA与弱碱B-混合溶液缓冲能力分析* |
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| 引用本文： | 陈晓峰,吴勇,李顺利,包建春.弱酸HA与弱碱B-混合溶液缓冲能力分析*[J].化学教育,2020,41(2):96-101. |
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| 作者姓名： | 陈晓峰 吴勇 李顺利 包建春 |
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| 作者单位： | 南京师范大学化学与材料科学学院 江苏南京 210023 |
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| 基金项目： | 南京师范大学2018年教学改革项目 |
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| 摘 要： | 计算了几个常见一元弱酸HA和一元弱碱B-混合溶液的pH,并对其缓冲能力进行了分析。结果表明,HA-B-溶液在一定的浓度条件下,具有一定的缓冲能力。当酸电离常数之比KHA/KHB接近1时,HA-B-溶液中主要存在HA-A-和HB-B- 2个缓冲对。随着KHA/KHB逐渐增大,B-的浓度越来越小,当KHA/KHB大于1 000时,HA-B-溶液主要存在的是HA-A-缓冲对。
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| 关 键 词： | 弱酸 弱碱 缓冲溶液 缓冲能力 |
Analysis of Buffer Capacity of Weak Acid HA and Weak Base B^-Solution |
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| CHEN Xiao-Feng,WU Yong,LI Shun-Li,BAO Jian-Chun.Analysis of Buffer Capacity of Weak Acid HA and Weak Base B^-Solution[J].Journal of Chemical Education,2020,41(2):96-101. |
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| Authors: | CHEN Xiao-Feng WU Yong LI Shun-Li BAO Jian-Chun |
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| Institution: | School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China |
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| Abstract: | In this paper,the pH of several common weak acid HA and weak base B-mixed solutions were calculated,and their buffering capacity was analyzed.The results show that the HA-B-solution has a certain buffer capacity.When the KHA/KHB is close to 1,there are mainly two buffer pairs of HA-A-and HB-B-.When KHA/KHB is greater than 1000,there is only HA-A-buffer pair. |
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| Keywords: | weak acid weak base buffer solution buffer capacity |
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