引用本文:
李莲云, 余惠娟, 尹华勤, 甘峰. 酸碱滴定中指示剂浓度的影响[J]. 大学化学,
2015, 30(6): 79-82.
doi:
10.3866/pku.DXHX20150679
Citation: Li Lianyun, Yu Huijuan, Yin Huaqin, Gan Feng. Influence of the Concentration of Indicator on Acid-base Titration[J]. University Chemistry, 2015, 30(6): 79-82. doi: 10.3866/pku.DXHX20150679
Citation: Li Lianyun, Yu Huijuan, Yin Huaqin, Gan Feng. Influence of the Concentration of Indicator on Acid-base Titration[J]. University Chemistry, 2015, 30(6): 79-82. doi: 10.3866/pku.DXHX20150679
酸碱滴定中指示剂浓度的影响
English
Influence of the Concentration of Indicator on Acid-base Titration
Abstract:
Discussion on the influences of the indicators in acid-base titration had been made based on theoretical calculations and experiments. The pH changes using general expression of acid-base titration were calculated when bromothymol blue and phenolphthalein were used as the indictors in the titration of HCl with NaOH. The results showed that too high or low concentration of the indicators did not help identify the end point. A proper concentration of indicator is the guarantee of sensitive color change, and thus the accuracy of the titration.
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Key words:
- Acid-base titration
- / Concentration of indicator
- / Bromothymol blue
- / Phenolphthalein
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[1] 甘峰.分析化学基础教程.北京:化学工业出版社,2007[1] 甘峰.分析化学基础教程.北京:化学工业出版社,2007
-
[2] 武汉大学.分析化学.第5版.北京:高等教育出版社,2006[2] 武汉大学.分析化学.第5版.北京:高等教育出版社,2006
-
[3] Flowers P A.J Chem Educ,1997,74:846[3] Flowers P A.J Chem Educ,1997,74:846
-
[4] De Levie R.Anal Chem,1996,68:585[4] De Levie R.Anal Chem,1996,68:585
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