缓冲容量精确计算  

Accurate Calculation of Buffer Capacity

作　　者：雷玉富 开小明[2] 

机构地区：[1]安徽安庆技师学院基础课教学部,安徽安庆246052 [2]安庆师范学院安徽光电磁功能材料省级实验室,安徽安庆246011

出　　处：《广州化工》2016年第1期131-132,共2页GuangZhou Chemical Industry

摘　　要：缓冲溶液在工业生产和科学研究中广泛应用,是基础化学教学中的重要教学内容。推导了两种三元弱酸组成缓冲溶液缓冲容量的计算公式,用excel具体计算了柠檬酸和磷酸组成缓冲溶液在不同p H值的缓冲容量,图示了缓冲容量随p H变化曲线,直观说明了上述缓冲溶液缓冲范围。图示结果表明,柠檬酸和磷酸组成缓冲溶液在p H<8直至强酸都具有很好的缓冲作用。The buffer solution is widely used in industrial production and research. It is an important teaching content of basic chemistry. The buffer capacity formula of two kinds of triprotic weak acid buffer solutions was introduced. The buffer capacity of various pH buffer solutions with citric acid and phosphoric acid was calculated by excel. The curve of buffer capacity vs pH was graphical representation. The buffer capacity range above buffer solutions was intuitive showed. Graphical representation showed that the buffer solutions with citric acid and phosphoric acid had very good buffer action from pH〈8 to strong acid.

关 键 词：缓冲溶液 缓冲容量 柠檬酸 磷酸 

分 类 号：O651[理学—分析化学]