摩尔比法测定磺基水杨酸铜组成与稳定常数的研究

doi:10.3866/PKU.DXHX202009064

University Chemistry ›› 2021, Vol. 36 ›› Issue (8): 2009064.doi: 10.3866/PKU.DXHX202009064

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Study about the Composition and Stability Constant of Sulfosalicylic Acid-Copper(Ⅱ) Complex by Mole Ratio Method

Min Peng, Jianxin Shi(), Zhou Wang, Lianyun Li

School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China

Received:2020-09-28 Accepted:2020-11-12 Published:2020-12-22
Contact: Jianxin Shi E-mail:cessjx@mail.sysu.edu.cn
Supported by:
2017年中山大学校级质量工程项目"重点教材建设项目"

Abstract

MSC2000:

Min Peng, Jianxin Shi, Zhou Wang, Lianyun Li. Study about the Composition and Stability Constant of Sulfosalicylic Acid-Copper(Ⅱ) Complex by Mole Ratio Method[J].University Chemistry, 2021, 36(8): 2009064.

溶液编号	V_H₃L/mL	V_Cu(NO₃)₂/mL	$n=\frac{c_{\mathrm{L}}}{c_{\mathrm{M}}} $	吸光度A	溶液编号	V_H₃L/mL	V_Cu(NO₃)₂/mL	$n=\frac{c_{\mathrm{L}}}{c_{\mathrm{M}}} $	吸光度A
1	0	10	0	0.003	7	2.0	10	1.00	0.435
2	0.2	10	0.10	0.055	8	4.0	10	2.00	0.546
3	0.4	10	0.20	0.113	9	6.0	10	3.00	0.579
4	0.6	10	0.30	0.163	10	8.0	10	4.00	0.603
5	1.0	10	0.50	0.258	11	10	10	5.00	0.606
6	1.5	10	0.75	0.364	12	12	10	6.00	0.608

A′	A_max	0.5A_max	n_B	0.5A_max对应c_L/(mol·L^-1)	α	n
0.447	0.606	0.303	0.608	0.00608	0.262	1

稳定常数计算公式	K_稳	lgK_稳	lgα_L(H)	lgK
(2)	164	2.21	6.60	8.81
(4)	1075	3.03	6.60	9.63
(5)	1052	3.02	6.60	9.62

测量点	pH	lgα_L(H)	lgK_稳	lgK
定容前	4.70	6.90	3.03	9.93
定容后	5.00	6.60	3.03	9.63

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Study about the Composition and Stability Constant of Sulfosalicylic Acid-Copper(Ⅱ) Complex by Mole Ratio Method

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