Complexation Equilibria of Silver(I) Ions with N-Phenylthiourea in Aqueous Solutions

Complexation between silver(I) ions and N -phenylthiourea is studied over a wide range of silver(I) and N -phenylthiourea (L) concentrations at 25.0°C and ionic strength I = 0.11 M (0.01 M HNO 3 + 0.1 M NaNO 3 ) by potentiometric titration using a silver electrode. Mono- and binuclear complexes are...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2020-07, Vol.65 (7), p.1081-1084
Main Authors: Samadov, A. S., Mironov, I. V., Gorichev, I. G., Stepnova, A. F.
Format: Article
Language:English
Subjects:
Aqueous solutions
Chemistry
Chemistry and Materials Science
Complexation
Inorganic Chemistry
Phenylthiourea
Physical Chemistry of Solutions
Silver
Stability constants
Titration
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Summary:Complexation between silver(I) ions and N -phenylthiourea is studied over a wide range of silver(I) and N -phenylthiourea (L) concentrations at 25.0°C and ionic strength I = 0.11 M (0.01 M HNO 3 + 0.1 M NaNO 3 ) by potentiometric titration using a silver electrode. Mono- and binuclear complexes are present in the studied concentration range of Ag + ions (1 × 10 –5 –1 × 10 –3 mol/L). is the dominant species. At C L / C Ag > 1, the content of mononuclear species is much lower than that of binuclear ones. The calculated overall stability constants of the complexes are as follows: log β 11 = 5.58, log β 12 = 10.75, log β 21 = 10.1, log β 22  = 17.1, log β 23 = 23.2, log β 24 = 25.9, and log β 25 = 29.2.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023620070177