An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations
Several works in the literature show that it is possible to establish the analytic equations to estimate the volume V of a strong base or a strong acid (Vb and Va, resp.) being added to a solution of a substance or a mix of substances during an acid-base titration, as well as the equations to estima...
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/540368 |
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| author | Norma Rodríguez-Laguna Alberto Rojas-Hernández María Teresa Ramírez-Silva Lucero Hernández-García Mario Romero-Romo |
| author_facet | Norma Rodríguez-Laguna Alberto Rojas-Hernández María Teresa Ramírez-Silva Lucero Hernández-García Mario Romero-Romo |
| author_sort | Norma Rodríguez-Laguna |
| collection | DOAJ |
| description | Several works in the literature show that it is possible to establish the analytic equations to estimate the volume V of a strong base or a strong acid (Vb and Va, resp.) being added to a solution of a substance or a mix of substances during an acid-base titration, as well as the equations to estimate the first derivative of the titration plot dpH/dV, and algebraic expressions to determine the buffer β capacity with dilution βdil. This treatment allows establishing the conditions of thermodynamic equilibria for all species within a system containing a mix of species from one or from various polyacid systems. The present work shows that it is possible to determine exactly the electric conductivity of aqueous solutions for these Brønsted acid-base titrations, because the functional relation between this property and the composition of the system in equilibrium is well known; this is achieved using the equivalent conductivity λi values of each of the ions present in a given system. The model employed for the present work confirms the experimental outcomes with the H2SO4, B(OH)3, CH3COOH, and H3PO4 aqueous solutions’ titration. |
| format | Article |
| id | doaj-art-dd7c66239586462db35f64df38e7b1c2 |
| institution | OA Journals |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-dd7c66239586462db35f64df38e7b1c22025-08-20T02:21:30ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/540368540368An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base TitrationsNorma Rodríguez-Laguna0Alberto Rojas-Hernández1María Teresa Ramírez-Silva2Lucero Hernández-García3Mario Romero-Romo4Laboratorio R-105/R-107, Área de Química Analítica, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, 09340 México, DF, MexicoLaboratorio R-105/R-107, Área de Química Analítica, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, 09340 México, DF, MexicoLaboratorio R-105/R-107, Área de Química Analítica, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, 09340 México, DF, MexicoLaboratorio R-105/R-107, Área de Química Analítica, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, 09340 México, DF, MexicoÁrea Ingeniería de Materiales, Departamento de Materiales, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, Avenida San Pablo 180, Colonia Reynosa-Tamaulipas, 02200 México, DF, MexicoSeveral works in the literature show that it is possible to establish the analytic equations to estimate the volume V of a strong base or a strong acid (Vb and Va, resp.) being added to a solution of a substance or a mix of substances during an acid-base titration, as well as the equations to estimate the first derivative of the titration plot dpH/dV, and algebraic expressions to determine the buffer β capacity with dilution βdil. This treatment allows establishing the conditions of thermodynamic equilibria for all species within a system containing a mix of species from one or from various polyacid systems. The present work shows that it is possible to determine exactly the electric conductivity of aqueous solutions for these Brønsted acid-base titrations, because the functional relation between this property and the composition of the system in equilibrium is well known; this is achieved using the equivalent conductivity λi values of each of the ions present in a given system. The model employed for the present work confirms the experimental outcomes with the H2SO4, B(OH)3, CH3COOH, and H3PO4 aqueous solutions’ titration.http://dx.doi.org/10.1155/2015/540368 |
| spellingShingle | Norma Rodríguez-Laguna Alberto Rojas-Hernández María Teresa Ramírez-Silva Lucero Hernández-García Mario Romero-Romo An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations Journal of Chemistry |
| title | An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations |
| title_full | An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations |
| title_fullStr | An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations |
| title_full_unstemmed | An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations |
| title_short | An Exact Method to Determine the Conductivity of Aqueous Solutions in Acid-Base Titrations |
| title_sort | exact method to determine the conductivity of aqueous solutions in acid base titrations |
| url | http://dx.doi.org/10.1155/2015/540368 |
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