基于绿色考虑的碱金属氢氧化物浓度的测定

doi:10.3866/PKU.DXHX202006067

Abstract

Abstract:

The classic experiment "determination of alkali hydroxide concentration" is widely used in chemical and pharmaceutical industries, as well as in university chemistry laboratory teaching. Therefore, disposal of the solutions produced by titration and prevention of their environmental pollution are very important in chemistry laboratory teaching, as well as in the industrial processes. We have selected the methods of visual colorimetry and potentiometric titration to determine potassium hydroxide concentration as an experiment for chemistry lab teaching based on green consideration. The solution produced by titration can be used directly in irrigating the plant, Spathiphyllum kochii. The teaching experiment will help students acquire methods for designing chemical experiments based on green consideration and inspire their interests of learning chemical courses.

Key words: Determination, Concentration, Potassium hydroxide, Aqueous solution, Green consideration

Xin Hu, Fuling Yin, Jun Yang, Ming Zhao. Determination of Alkali Hydroxide Concentration Based on Green Consideration[J].University Chemistry, 2021, 36(6): 2006067.

Figures/Tables 8

References 16

1	Hjeresen D. L. ; Schutt D. L. ; Boese J. M. J. Chem. Educ. 2000, 77 (12), 1543. doi: 10.1021/ed077p1543
2	Kirchhoff M. M. J. Chem. Educ. 2001, 78 (12), 1577. doi: 10.1021/ed078p1577
3	Goodwin T. E. J. Chem. Educ. 2004, 81 (8), 1187. doi: 10.1021/ed081p1187
4	Van Arnum S. D. J. Chem. Educ. 2005, 82 (11), 1689. doi: 10.1021/ed082p1689
5	Gross E. M. J. Chem. Educ. 2013, 90 (4), 429. doi: 10.1021/ed200756z
6	Schaber P. M. ; Larkin J. E. ; Pines H. A. ; Berchou K. ; Wierchowski E. ; Marconi A. ; Suriani A. J. Chem. Educ. 2012, 89 (10), 1327. doi: 10.1021/ed200536e
7	Graham K. J. ; Jones T. N. ; Schaller C. P. ; McIntee E. J. J. Chem. Educ. 2014, 91 (11), 1895. doi: 10.1021/ed5000394
8	Kennedy S. A. J. Chem. Educ. 2016, 93 (4), 645. doi: 10.1021/acs.jchemed.5b00432
9	Zeng, H. H.; Liu, J. Y. Modern Experimental Chemistry, Vol. 1. 1st ed.; Peking University Medical Press: Beijing, China, 2004; p. 202.
	曾慧慧, 刘俊义. 现代实验化学(上册). 第1版. 北京: 北京大学医学出版社, 2004: 202.
10	Yassin G. H. ; Koek J. H. ; Kuhnert N. Food. Res. Intl. 2014, 63, 317. doi: 10.1016/j.foodres.2014.04.010
11	Lu R. R. ; Dong H. F. ; Wang W. J. ; Yang J. ; Tang Z. Y. ; Qin L. L. J. China Three Gorges Univ (Natural Sciences) 2008, 30 (4), 76.
	鲁蓉蓉; 董海丰; 汪无际; 杨俊; 唐植宇; 覃玲莉; 三峡大学学报(自然科学版), 2008, 30 (4), 76.
12	Byamukama R. ; Waninda E. N. ; Mukama D. ; Namukobe J. Int. J. Biol. Chem. Sci. 2016, 10 (6), 2716.
13	Saptarini N. M. ; Suryasaputra D. ; Nurmalia H. J. Chem. Pharm. Res. 2015, 7 (2), 275.
14	Guimarães. W. ; Alves M. I. R. ; Antoniosi Filho R. N. Quimica Nova 2012, 35 (8), 1673. doi: 10.1590/S0100-40422012000800030
15	Wei Y. H. ; Wei L. X. ; Wang L. P. ; Lun Z. B. ; Qin X. J. ; Liang S. H. J. Nanning Teacher's College 2001, 4, 73. doi: 10.3969/j.issn.1674-8891.2001.04.022
	韦友欢; 韦良兴; 王丽平; 伦振彪; 覃雄军; 梁素珩; 南宁师范高等专科学校学报, 2001, (4), 73. doi: 10.3969/j.issn.1674-8891.2001.04.022
16	Zhao M. Univ. Chem. 2011, 26 (1), 7.
	赵明; 大学化学, 2011, 26 (1), 7.

Solutions	pH	Solutions	pH
Distilled water	6.64	BTP visual colorimetry	7.54
Control	8.27	Potentiometry	7.49

Methods	Mean ± SD (mol∙L^-1)	t	t (0.05, 4) two tails	P (2, 2)
Control	0.08476 ± 0.00003
BTP visual colorimetry	0.08445 ± 0.00031	1.722	2.776	0.165
Potentiometric titration	0.08464 ± 0.00033	0.627	2.776	0.556

Group	BTP Colorimetry n = 3	Control n = 3	Potentiometry n = 3
Group	BMean ± SD (mol∙L^-1)	Mean ± SD (mol∙L^-1)	Mean ± SD (mol∙L^-1)
1	0.08942 ± 0.00025	0.08972 ± 0.00040	0.08924 ± 0.00025
2	0.08921 ± 0.00020	0.08936 ± 0.00005	0.08940 ± 0.00048
3	0.08933 ± 0.00024	0.08951 ± 0.00005	0.09013 ± 0.00104
4	0.08952 ± 0.00038	0.08798 ± 0.00077	0.08969 ± 0.00074
5	0.08895 ± 0.00023	0.08979 ± 0	0.08894 n = 1
6	0.08922 ± 0.00041	0.08960 ± 0.00040	0.09125 n = 1
7	0.08914 ± 0.00064	0.08828 ± 0.00118
8	0.08952 ± 0.00018	0.08963 ± 0.00010
9	0.08929 ± 0.00037	0.08947 ± 0.00030
10	0.08927 ± 0.00069	0.08870 ± 0.00039
Population	0.08929 ± 0.00037	0.08921 ± 0.00076	0.08968 ± 0.00080
Mean ± SD	n = 30	n = 30	n = 14
P (2, 2)	0.674		0.0653

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Determination of Alkali Hydroxide Concentration Based on Green Consideration

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