Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone
- Autores
- Madriz Ruiz, Lorean Mercedes; Cabrerizo, Franco Martín; Vargas, Ronald
- Año de publicación
- 2021
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In this communication, a remote experimental activity in chemical kinetics is described, taking into account the quantification based on the optical sensor of a smartphone. The objective pursued herein is to equip students with the appropriate tools and strategies required to empirically determine the parameters of the rate law including reaction orders, rate constant (k), frequency factor (A), and activation energy (Eₐ). Typical results of the proposed protocol are shown and discussed in the framework of the bleaching reaction of food dye allura red (RD40) and hypochlorite, as a representative example. A graphical approach of the concentration vs time data measured under the experimental condition where [RD40] ≪ [ClO⁻] (isolation method) suggests a first-order kinetics with respect to the dye. In addition, the analysis of the pseudo-first-order constant (kobs) shows a first-order relationship with respect to ClO⁻. In addition, using the two-point form of the Arrhenius equation, values of 3.22 × 10⁷ s/M and 44.55 kJ/mol were obtained for A and Eₐ, respectively. Interestingly, all the kinetic parameters (reaction orders, k, A, and Eₐ) are on the same order of magnitude as those previously reported in the literature and acquired with more sophisticated and accurate equipment. This experience provides evidence that it is possible to proceed with remote experimental activities to deepen the collection and analysis of kinetic data during a pandemic.
Facultad de Ciencias Exactas
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Ciencias Exactas
Física
Química
Hands-On Learning/Manipulatives
Second-Year Undergraduate
Physical Chemistry
Kinetics
Rate Law
UV−Vis Spectroscopy - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/132657
Ver los metadatos del registro completo
id |
SEDICI_d89aadb546aa996220d713ec1afe3ee0 |
---|---|
oai_identifier_str |
oai:sedici.unlp.edu.ar:10915/132657 |
network_acronym_str |
SEDICI |
repository_id_str |
1329 |
network_name_str |
SEDICI (UNLP) |
spelling |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a SmartphoneMadriz Ruiz, Lorean MercedesCabrerizo, Franco MartínVargas, RonaldCiencias ExactasFísicaQuímicaHands-On Learning/ManipulativesSecond-Year UndergraduatePhysical ChemistryKineticsRate LawUV−Vis SpectroscopyIn this communication, a remote experimental activity in chemical kinetics is described, taking into account the quantification based on the optical sensor of a smartphone. The objective pursued herein is to equip students with the appropriate tools and strategies required to empirically determine the parameters of the rate law including reaction orders, rate constant (k), frequency factor (A), and activation energy (Eₐ). Typical results of the proposed protocol are shown and discussed in the framework of the bleaching reaction of food dye allura red (RD40) and hypochlorite, as a representative example. A graphical approach of the concentration vs time data measured under the experimental condition where [RD40] ≪ [ClO⁻] (isolation method) suggests a first-order kinetics with respect to the dye. In addition, the analysis of the pseudo-first-order constant (k<sub>obs</sub>) shows a first-order relationship with respect to ClO⁻. In addition, using the two-point form of the Arrhenius equation, values of 3.22 × 10⁷ s/M and 44.55 kJ/mol were obtained for A and Eₐ, respectively. Interestingly, all the kinetic parameters (reaction orders, k, A, and Eₐ) are on the same order of magnitude as those previously reported in the literature and acquired with more sophisticated and accurate equipment. This experience provides evidence that it is possible to proceed with remote experimental activities to deepen the collection and analysis of kinetic data during a pandemic.Facultad de Ciencias ExactasInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2021-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2117-2121http://sedici.unlp.edu.ar/handle/10915/132657enginfo:eu-repo/semantics/altIdentifier/issn/0021-9584info:eu-repo/semantics/altIdentifier/issn/1938-1328info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jchemed.0c01427info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:31:48Zoai:sedici.unlp.edu.ar:10915/132657Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:31:48.398SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone |
title |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone |
spellingShingle |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone Madriz Ruiz, Lorean Mercedes Ciencias Exactas Física Química Hands-On Learning/Manipulatives Second-Year Undergraduate Physical Chemistry Kinetics Rate Law UV−Vis Spectroscopy |
title_short |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone |
title_full |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone |
title_fullStr |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone |
title_full_unstemmed |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone |
title_sort |
Exploring Chemical Kinetics at Home in Times of Pandemic: Following the Bleaching of Food Dye Allura Red Using a Smartphone |
dc.creator.none.fl_str_mv |
Madriz Ruiz, Lorean Mercedes Cabrerizo, Franco Martín Vargas, Ronald |
author |
Madriz Ruiz, Lorean Mercedes |
author_facet |
Madriz Ruiz, Lorean Mercedes Cabrerizo, Franco Martín Vargas, Ronald |
author_role |
author |
author2 |
Cabrerizo, Franco Martín Vargas, Ronald |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Ciencias Exactas Física Química Hands-On Learning/Manipulatives Second-Year Undergraduate Physical Chemistry Kinetics Rate Law UV−Vis Spectroscopy |
topic |
Ciencias Exactas Física Química Hands-On Learning/Manipulatives Second-Year Undergraduate Physical Chemistry Kinetics Rate Law UV−Vis Spectroscopy |
dc.description.none.fl_txt_mv |
In this communication, a remote experimental activity in chemical kinetics is described, taking into account the quantification based on the optical sensor of a smartphone. The objective pursued herein is to equip students with the appropriate tools and strategies required to empirically determine the parameters of the rate law including reaction orders, rate constant (k), frequency factor (A), and activation energy (Eₐ). Typical results of the proposed protocol are shown and discussed in the framework of the bleaching reaction of food dye allura red (RD40) and hypochlorite, as a representative example. A graphical approach of the concentration vs time data measured under the experimental condition where [RD40] ≪ [ClO⁻] (isolation method) suggests a first-order kinetics with respect to the dye. In addition, the analysis of the pseudo-first-order constant (k<sub>obs</sub>) shows a first-order relationship with respect to ClO⁻. In addition, using the two-point form of the Arrhenius equation, values of 3.22 × 10⁷ s/M and 44.55 kJ/mol were obtained for A and Eₐ, respectively. Interestingly, all the kinetic parameters (reaction orders, k, A, and Eₐ) are on the same order of magnitude as those previously reported in the literature and acquired with more sophisticated and accurate equipment. This experience provides evidence that it is possible to proceed with remote experimental activities to deepen the collection and analysis of kinetic data during a pandemic. Facultad de Ciencias Exactas Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
description |
In this communication, a remote experimental activity in chemical kinetics is described, taking into account the quantification based on the optical sensor of a smartphone. The objective pursued herein is to equip students with the appropriate tools and strategies required to empirically determine the parameters of the rate law including reaction orders, rate constant (k), frequency factor (A), and activation energy (Eₐ). Typical results of the proposed protocol are shown and discussed in the framework of the bleaching reaction of food dye allura red (RD40) and hypochlorite, as a representative example. A graphical approach of the concentration vs time data measured under the experimental condition where [RD40] ≪ [ClO⁻] (isolation method) suggests a first-order kinetics with respect to the dye. In addition, the analysis of the pseudo-first-order constant (k<sub>obs</sub>) shows a first-order relationship with respect to ClO⁻. In addition, using the two-point form of the Arrhenius equation, values of 3.22 × 10⁷ s/M and 44.55 kJ/mol were obtained for A and Eₐ, respectively. Interestingly, all the kinetic parameters (reaction orders, k, A, and Eₐ) are on the same order of magnitude as those previously reported in the literature and acquired with more sophisticated and accurate equipment. This experience provides evidence that it is possible to proceed with remote experimental activities to deepen the collection and analysis of kinetic data during a pandemic. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/132657 |
url |
http://sedici.unlp.edu.ar/handle/10915/132657 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0021-9584 info:eu-repo/semantics/altIdentifier/issn/1938-1328 info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jchemed.0c01427 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf 2117-2121 |
dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
reponame_str |
SEDICI (UNLP) |
collection |
SEDICI (UNLP) |
instname_str |
Universidad Nacional de La Plata |
instacron_str |
UNLP |
institution |
UNLP |
repository.name.fl_str_mv |
SEDICI (UNLP) - Universidad Nacional de La Plata |
repository.mail.fl_str_mv |
alira@sedici.unlp.edu.ar |
_version_ |
1844616197922881536 |
score |
13.070432 |