Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system
General relations among thermodynamic parameters characterizing chemical equilibria including species H2A+, HA, H+ and A- in both phases of a two-phase water-nitrobenzene extraction system have been derived. From the extraction measurements, the equilibrium distribution constant of electroneutral 1-...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2000-08-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/HtDocs/SHD/Vol65/No8-Pdf/jscs8-07.pdf |
| _version_ | 1811260784259366912 |
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| author | PETR VANURA EMANUEL MAKRLIK |
| author_facet | PETR VANURA EMANUEL MAKRLIK |
| author_sort | PETR VANURA |
| collection | DOAJ |
| description | General relations among thermodynamic parameters characterizing chemical equilibria including species H2A+, HA, H+ and A- in both phases of a two-phase water-nitrobenzene extraction system have been derived. From the extraction measurements, the equilibrium distribution constant of electroneutral 1-(2-thiazolylazo)-2-naphthol (TAN, HA) between the nitrobenzene and aqueous phases has been determined: log KD(HA) = 3.90±0.02. By using this value and further known constants and applying the mentioned relations, the following values of dissociation constants of TAN in nitrobenzene saturated with water have been calculated for a temperature of 25°C: pKdnb(H2A+) = -log Kdnb(H2A+) = 4.9 and pKdnb(HA) = -log Kdnb(HA) = 16.5. |
| first_indexed | 2024-04-12T18:52:50Z |
| format | Article |
| id | doaj.art-37ba65f4cebe41338d6d5e72622787df |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-04-12T18:52:50Z |
| publishDate | 2000-08-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-37ba65f4cebe41338d6d5e72622787df2022-12-22T03:20:26ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392000-08-01658581585Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction systemPETR VANURAEMANUEL MAKRLIKGeneral relations among thermodynamic parameters characterizing chemical equilibria including species H2A+, HA, H+ and A- in both phases of a two-phase water-nitrobenzene extraction system have been derived. From the extraction measurements, the equilibrium distribution constant of electroneutral 1-(2-thiazolylazo)-2-naphthol (TAN, HA) between the nitrobenzene and aqueous phases has been determined: log KD(HA) = 3.90±0.02. By using this value and further known constants and applying the mentioned relations, the following values of dissociation constants of TAN in nitrobenzene saturated with water have been calculated for a temperature of 25°C: pKdnb(H2A+) = -log Kdnb(H2A+) = 4.9 and pKdnb(HA) = -log Kdnb(HA) = 16.5.http://www.shd.org.yu/HtDocs/SHD/Vol65/No8-Pdf/jscs8-07.pdf1-(2-thiazolylazo)-2-naphtholwater -nitrobenzene systemdistribution constantdissociation constants |
| spellingShingle | PETR VANURA EMANUEL MAKRLIK Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system Journal of the Serbian Chemical Society 1-(2-thiazolylazo)-2-naphthol water -nitrobenzene system distribution constant dissociation constants |
| title | Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system |
| title_full | Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system |
| title_fullStr | Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system |
| title_full_unstemmed | Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system |
| title_short | Contribution to the thermodynamics of 1-(2-thiazolylazo)-2-naphthol in the water-nitrobenzene extraction system |
| title_sort | contribution to the thermodynamics of 1 2 thiazolylazo 2 naphthol in the water nitrobenzene extraction system |
| topic | 1-(2-thiazolylazo)-2-naphthol water -nitrobenzene system distribution constant dissociation constants |
| url | http://www.shd.org.yu/HtDocs/SHD/Vol65/No8-Pdf/jscs8-07.pdf |
| work_keys_str_mv | AT petrvanura contributiontothethermodynamicsof12thiazolylazo2naphtholinthewaternitrobenzeneextractionsystem AT emanuelmakrlik contributiontothethermodynamicsof12thiazolylazo2naphtholinthewaternitrobenzeneextractionsystem |