希托夫法测定离子迁移数实验的改进
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摘要
针对物理化学实验中传统的希托夫法测定离子迁移数的实验设计易出现时间久,实验结果不准确的特点,对实验方案进行了改进。采用操作速度快、准确率更高的电导滴定法代替实验中的化学滴定法来确定铜离子浓度。同时给出了该实验的实验原理和操作方法,并对改进前后的实验结果和时间进行了对比。学生实验结果表明改进后的实验准确性和可操作性皆有较大提升。
An improved experiment for determining ion transference numbers by Hittorf method was established,which was usually difficult to operate because of the long experiment time and the inaccurate results. Conductometric titration with fast operating speed,high accuracy rate and easy operation was used to replace the chemical titration in experiment to determine the copper ion content. The experimental principle and operation method were introduced,and comparison of the student experimental time and results before and after improvement were discussed. Students' experiment results showed that the accuracy and maneuverability were both improved.
An improved experiment for determining ion transference numbers by Hittorf method was established,which was usually difficult to operate because of the long experiment time and the inaccurate results. Conductometric titration with fast operating speed,high accuracy rate and easy operation was used to replace the chemical titration in experiment to determine the copper ion content. The experimental principle and operation method were introduced,and comparison of the student experimental time and results before and after improvement were discussed. Students' experiment results showed that the accuracy and maneuverability were both improved.
引文
[1]孙尔康,高卫,徐维清,等.物理化学实验.2版[M].南京:南京大学出版社,2010:75-76.
[2]沈文霞.物理化学核心教程[M].北京:科学出版社,2009:300.
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[4]赵燕萍,吴兆民,曾昊,等.离子迁移数测定实验的改进[J].襄樊学院学报,2001,22(5):59-60.
[5]冯彤英,吕京美,詹世景.独立学院物理化学实验教学实践与探索[J].广东化工,2013,40(18):164-165.
[6]韩阗俐,张忠平,万新军.浅析地方高校物理化学实验教学中的不足与改进方法[J].大学教育,2012,1(3):53-54.
[7]张国林,刘正铭.希托夫离子迁移数测定仪的改进[J].实验室研究与探索,2000,19(4):100-101.
[8]杨绳岩.孟祥珍.Cu SO4在混合溶剂中离子迁移数的研究[J].科技视界,2014(36):47-48.
[9]沈丽,赵亚萍,竺海能,等.希托夫法测定离子迁移数实验的改进[J].实验室科学,2014,17(6):29-30.
[10]孙雅飞,王静怡,曲卫东,等.Hittorf法测定离子迁移数实验的改进[J].大学化学,2016,31(12):59-63.
[2]沈文霞.物理化学核心教程[M].北京:科学出版社,2009:300.
[3]朱灵峰.希托夫法求离子迁移数计算通式[J].大学化学,1992,7(4):25-26.
[4]赵燕萍,吴兆民,曾昊,等.离子迁移数测定实验的改进[J].襄樊学院学报,2001,22(5):59-60.
[5]冯彤英,吕京美,詹世景.独立学院物理化学实验教学实践与探索[J].广东化工,2013,40(18):164-165.
[6]韩阗俐,张忠平,万新军.浅析地方高校物理化学实验教学中的不足与改进方法[J].大学教育,2012,1(3):53-54.
[7]张国林,刘正铭.希托夫离子迁移数测定仪的改进[J].实验室研究与探索,2000,19(4):100-101.
[8]杨绳岩.孟祥珍.Cu SO4在混合溶剂中离子迁移数的研究[J].科技视界,2014(36):47-48.
[9]沈丽,赵亚萍,竺海能,等.希托夫法测定离子迁移数实验的改进[J].实验室科学,2014,17(6):29-30.
[10]孙雅飞,王静怡,曲卫东,等.Hittorf法测定离子迁移数实验的改进[J].大学化学,2016,31(12):59-63.