引用本文:
王园朝, 程和勇. 工业混合碱各组分含量测定——一种综合型实验方案设计[J]. 大学化学,
2023, 38(1): 199-205.
doi:
10.3866/PKU.DXHX202202043
Citation: Yuanchao Wang, Heyong Cheng. Design of a Comprehensive Experiment for Determination of Each Component in Industrial Mixed Alkali[J]. University Chemistry, 2023, 38(1): 199-205. doi: 10.3866/PKU.DXHX202202043
Citation: Yuanchao Wang, Heyong Cheng. Design of a Comprehensive Experiment for Determination of Each Component in Industrial Mixed Alkali[J]. University Chemistry, 2023, 38(1): 199-205. doi: 10.3866/PKU.DXHX202202043
工业混合碱各组分含量测定——一种综合型实验方案设计
摘要:
利用两类双指示剂法、BaCl2法和电位滴定法等4种实验方法，分别测定了工业混合碱I (NaOH + Na2CO3)和混合碱II (Na2CO3 + NaHCO3)溶液中NaOH、Na2CO3与NaHCO3等3种成分的质量浓度(即单位体积溶液中组分质量)。计算和比较了不同分析方法测定结果的误差和标准偏差，对不同分析方法测定结果进行了显著性检验，并分析了产生误差及造成显著性差异的原因。结果表明：电位滴定法的准确度和精密度均较好，BaCl2法的准确度和精密度较差；BaCl2法与其他3种方法测定结果的数据之间存在显著性差异。本文内容不仅对工业混合碱中各组分含量测定方法提供了一个参考，而且为酸碱滴定实验教学提供了一个综合型实验项目的设计方案。
English
Design of a Comprehensive Experiment for Determination of Each Component in Industrial Mixed Alkali
Abstract:
Four experimental methods, including two double-indicator methods, the BaCl2 method and the potentiometric titration method were developed for determining the mass concentration (Mass of components in unit volume of solution) of NaOH, Na2CO3 and NaHCO3 in two types of industrial mixed alkali solutions, i.e., solutions I (NaOH + Na2CO3) and II (Na2CO3 + NaHCO3). Errors and standard deviations of the four analytical methods were calculated and compared based on the measurements. Significance tests were also performed on the results of the four methods, and possible factors/causes that led to poor accuracy and significant differences were also discussed. It was concluded from the experimental results that the potentiometric titration offered the highest accuracy and precision, whereas the BaCl2 method suffered from the lowest accuracy and precision from among the four methods. The results also showed significant differences between the BaCl2 method and the other three methods. This paper not only provides a reference for the accurate determination of each component in industrial bases, but also supplies a comprehensive experimental protocol for acid-base titration teaching experiments.
-
-
[1]
武汉大学. 分析化学实验. 第5版. 北京: 高等教育出版社, 2016.
-
[2]
华中师范大学等. 分析化学实验. 第4版. 北京: 高等教育出版社, 2011.
-
[3]
邓艳丽, 杨诗佳. 河南科技学院学报, 2012, 40 (4), 67.
-
[4]
彭国丽, 刘家春. 金陵科技学院学报, 2006, 22 (4), 102.
-
[5]
仵春祺, 徐天昊, 王艳红, 张湘英, 张锡娅. 仪器分析, 2014, No. 3, 88.
-
[6]
牛丽丹. 山东化工, 2016, 45 (20), 90.
-
[7]
孙文利, 王春, 刘洋, 赵晓冉. 技术前沿与装备应用, 2018, No. 12, 25.
-
[8]
王晓艳. 化学工程与装备, 2010, No. 1, 164.
-
[9]
陈大为. 中国教育技术装备, 2019, No. 3, 124.
-
[10]
刘霞. 大学化学, 2018, 33 (1), 21.
-
[11]
李玉金. 天津职业院校联合学报, 2021, 23 (6), 77.
-
[12]
武汉大学. 分析化学. 第5版. 北京: 高等教育出版社, 2016.
-
[13]
华中师范大学等. 分析化学. 第4版. 北京: 高等教育出版社, 2011.
-
[14]
中国国家标准化管理委员会. 化学试剂 电位滴定法通则: GB/T 9725–2007. 北京: 中国标准出版社, 2008.
-
[15]
华东理工大学化学系等. 分析化学. 第5版. 北京: 高等教育出版社, 2008.
-
[1]
-
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