PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids
In this paper, original methods for determining such thermodynamic characteristics as solubility product (KS) or the activity product of slightly soluble hydroxides and acids are communicated. Developed methods for determining KS and solubility S are based only on the pH values of the saturated aque...
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| Format: | Article |
| Language: | English |
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Estfalia
2021-12-01
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| Series: | Romanian Journal of Ecology & Environmental Chemistry |
| Subjects: | |
| Online Access: | http://www.rjeec.ro/Read/121?id=PH-metric%20method%20for%20determining%20the%20solubility%20and%20solubility%20products%20of%20slightly%20soluble%20hydroxides%20and%20acids |
| _version_ | 1827761671882407936 |
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| author | Igor Povar Oxana Spinu Boris Pintilie |
| author_facet | Igor Povar Oxana Spinu Boris Pintilie |
| author_sort | Igor Povar |
| collection | DOAJ |
| description | In this paper, original methods for determining such thermodynamic characteristics as solubility product (KS) or the activity product of slightly soluble hydroxides and acids are communicated. Developed methods for determining KS and solubility S are based only on the pH values of the saturated aqueous solution for a known initial composition of the heterogeneous mixture and the equilibrium constants of an arbitrary set of possible side reactions in the aqueous natural systems. The determination of solubility S and solubility product KS is also possible in the presence of other hydroxides or acids of known concentrations. Deduced equations allow the calculation of such characteristics, as the equilibrium concentrations of the components of slightly soluble compounds in aqueous phase and the degree of precipitation γ of the solid phase for different initial concentrations of the components of the heterogeneous mixture which are known in the process of preparing the mixture, requiring only experimental pH values of a saturated solution. From the known experimental pH data, S and KS were calculated for a series of hydroxides and acids of arbitrary composition. The obtained results correlated well with the known tabular values. Analysis of a number of real systems illustrated the deduced expressions, including calculations and theoretical explanations. |
| first_indexed | 2024-03-11T10:16:17Z |
| format | Article |
| id | doaj.art-f5c32354ba01430291e304d7cdb9f7eb |
| institution | Directory Open Access Journal |
| issn | 2668-5418 2668-8530 |
| language | English |
| last_indexed | 2024-03-11T10:16:17Z |
| publishDate | 2021-12-01 |
| publisher | Estfalia |
| record_format | Article |
| series | Romanian Journal of Ecology & Environmental Chemistry |
| spelling | doaj.art-f5c32354ba01430291e304d7cdb9f7eb2023-11-16T08:38:10ZengEstfaliaRomanian Journal of Ecology & Environmental Chemistry2668-54182668-85302021-12-01323241https://doi.org/10.21698/rjeec.2021.204PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acidsIgor Povar0Oxana Spinu1Boris Pintilie2Institute of Chemistry, MoldovaInstitute of Chemistry, MoldovaInstitute of Chemistry, MoldovaIn this paper, original methods for determining such thermodynamic characteristics as solubility product (KS) or the activity product of slightly soluble hydroxides and acids are communicated. Developed methods for determining KS and solubility S are based only on the pH values of the saturated aqueous solution for a known initial composition of the heterogeneous mixture and the equilibrium constants of an arbitrary set of possible side reactions in the aqueous natural systems. The determination of solubility S and solubility product KS is also possible in the presence of other hydroxides or acids of known concentrations. Deduced equations allow the calculation of such characteristics, as the equilibrium concentrations of the components of slightly soluble compounds in aqueous phase and the degree of precipitation γ of the solid phase for different initial concentrations of the components of the heterogeneous mixture which are known in the process of preparing the mixture, requiring only experimental pH values of a saturated solution. From the known experimental pH data, S and KS were calculated for a series of hydroxides and acids of arbitrary composition. The obtained results correlated well with the known tabular values. Analysis of a number of real systems illustrated the deduced expressions, including calculations and theoretical explanations.http://www.rjeec.ro/Read/121?id=PH-metric%20method%20for%20determining%20the%20solubility%20and%20solubility%20products%20of%20slightly%20soluble%20hydroxides%20and%20acidsslightly soluble compoundssolubilitysolubility productsthermodynamic modeling |
| spellingShingle | Igor Povar Oxana Spinu Boris Pintilie PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids Romanian Journal of Ecology & Environmental Chemistry slightly soluble compounds solubility solubility products thermodynamic modeling |
| title | PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids |
| title_full | PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids |
| title_fullStr | PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids |
| title_full_unstemmed | PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids |
| title_short | PH-metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids |
| title_sort | ph metric method for determining the solubility and solubility products of slightly soluble hydroxides and acids |
| topic | slightly soluble compounds solubility solubility products thermodynamic modeling |
| url | http://www.rjeec.ro/Read/121?id=PH-metric%20method%20for%20determining%20the%20solubility%20and%20solubility%20products%20of%20slightly%20soluble%20hydroxides%20and%20acids |
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