婴儿湿巾缓冲能力的测试——一个贴近生活的实验

doi:10.3866/PKU.DXHX201905022

University Chemistry ›› 2020, Vol. 35 ›› Issue (1): 76-79.doi: 10.3866/PKU.DXHX201905022

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Testing the Buffer Capacity of Baby Wipes: An Experiment Close to Life

Fan Yu^1,*(),Bao Li^2,*()

¹ Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, P. R. China
² School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China

Received:2019-05-06 Accepted:2019-07-03 Published:2019-07-26
Contact: Fan Yu,Bao Li E-mail:yufan0714@163.com;libao@hust.edu.cn
Supported by:
湖北省武汉市教育局(2014006);国家自然科学基金(51403079)

Abstract

Abstract:

In order to effectively enhance students' interest and enthusiasm in learning buffer solution, a case of introducing real daily necessities into laboratory teaching is recommended. The experimental design extends the property test to the baby wipe, and changes the content of the experiment into the verification of the working principle of wipe, instead of preparation of simple acid-base system and related verification experiments in the past. Through the implementation of this experiment, students generally reflected that it can effectively stimulate their enthusiasm and interest in learning buffer solution related contents, and ultimately promote them to recognize the characteristics and buffer mechanism of pH changes in buffer system.

Key words: Buffer solution, Baby wipe, Experimental design, Learning interest

MSC2000:

Fan Yu,Bao Li. Testing the Buffer Capacity of Baby Wipes: An Experiment Close to Life[J].University Chemistry, 2020, 35(1): 76-79.

溶液体系	初始体积/mL	pH变化值	滴定管初始读数/mL	滴定管最终读数/mL	缓冲容量/(mol∙L⁻¹)
醋酸/醋酸钠缓冲体系Ⅰ	40.0	1.02	0.00	17.01	4.17 × 10⁻²
醋酸/醋酸钠缓冲体系Ⅱ	40.0	1.05	0.00	5.33	1.19 × 10⁻²
氯化铵/氨缓冲体系	40.0	1.01	0.00	16.9	4.18 × 10⁻²
去离子水	40.0	3.78	0.00	0.10	6.61 × 10⁻⁵
婴儿湿巾缓冲体系Ⅰ	40.0	1.05	0.00	1.13	1.88 × 10⁻³
婴儿湿巾缓冲体系Ⅱ	40.0	1.06	0.00	0.65	1.53 × 10⁻³
婴儿湿巾缓冲体系Ⅲ	40.0	1.11	0.00	0.44	1.27 × 10⁻³

溶液体系	初始体积/mL	pH变化值	滴定管初始读数/mL	滴定管最终读数/mL	缓冲容量/(mol∙L⁻¹)
醋酸/醋酸钠缓冲体系Ⅰ	40.0	1.04	0.00	16.8	4.04 × 10⁻²
醋酸/醋酸钠缓冲体系Ⅱ	40.0	1.03	0.00	5.87	1.42 × 10⁻²
氯化铵/氨缓冲体系	40.0	1.03	0.00	16.5	4.00 × 10⁻²
去离子水	40.0	3.64	0.00	0.10	6.67 × 10⁻⁵
婴儿湿巾缓冲体系Ⅰ	40.0	1.07	0.00	1.25	1.79 × 10⁻³
婴儿湿巾缓冲体系Ⅱ	40.0	1.02	0.00	0.59	1.45 × 10⁻³
婴儿湿巾缓冲体系Ⅲ	40.0	1.15	0.00	0.41	1.36 × 10⁻³

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Testing the Buffer Capacity of Baby Wipes: An Experiment Close to Life

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