Electrometric investigations on formation of lanthanum molybdates as a function of Ph

Detalhes bibliográficos
Autor(a) principal: Prasad,Shiva
Data de Publicação: 2004
Outros Autores: Leite,Valderí D., Santana,Renato A.C. de, Brito,Joelma B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000200014
Resumo: The precise nature of the reaction between lanthanum nitrate and sodium molybdate at specific pH levels 7.6, 5.5 and 4.1 has been studied by means of electrometric techniques involving potentiometric and conductometric titrations, in aqueous and alcoholic media using each reagent as titrant. Well-defined breaks and inflections in the titration curves provide cogent evidence for formation and precipitation of lanthanum normal-La2O3.3MoO3, para- La2O3.7MoO3 and octa-2 La2O3.24MoO3 molybdates in the vicinity of pH 5.9, 4.8 and 4.2, respectively. Analytical investigations of the precipitates of lanthanum molybdates have also been carried out, which substantiate the results of the electrometric study.
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spelling Electrometric investigations on formation of lanthanum molybdates as a function of Phmolybdateslanthanum molybdateselectrometryThe precise nature of the reaction between lanthanum nitrate and sodium molybdate at specific pH levels 7.6, 5.5 and 4.1 has been studied by means of electrometric techniques involving potentiometric and conductometric titrations, in aqueous and alcoholic media using each reagent as titrant. Well-defined breaks and inflections in the titration curves provide cogent evidence for formation and precipitation of lanthanum normal-La2O3.3MoO3, para- La2O3.7MoO3 and octa-2 La2O3.24MoO3 molybdates in the vicinity of pH 5.9, 4.8 and 4.2, respectively. Analytical investigations of the precipitates of lanthanum molybdates have also been carried out, which substantiate the results of the electrometric study.Sociedade Brasileira de Química2004-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000200014Journal of the Brazilian Chemical Society v.15 n.2 2004reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532004000200014info:eu-repo/semantics/openAccessPrasad,ShivaLeite,Valderí D.Santana,Renato A.C. deBrito,Joelma B.eng2004-06-29T00:00:00Zoai:scielo:S0103-50532004000200014Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2004-06-29T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Electrometric investigations on formation of lanthanum molybdates as a function of Ph
title Electrometric investigations on formation of lanthanum molybdates as a function of Ph
spellingShingle Electrometric investigations on formation of lanthanum molybdates as a function of Ph
Prasad,Shiva
molybdates
lanthanum molybdates
electrometry
title_short Electrometric investigations on formation of lanthanum molybdates as a function of Ph
title_full Electrometric investigations on formation of lanthanum molybdates as a function of Ph
title_fullStr Electrometric investigations on formation of lanthanum molybdates as a function of Ph
title_full_unstemmed Electrometric investigations on formation of lanthanum molybdates as a function of Ph
title_sort Electrometric investigations on formation of lanthanum molybdates as a function of Ph
author Prasad,Shiva
author_facet Prasad,Shiva
Leite,Valderí D.
Santana,Renato A.C. de
Brito,Joelma B.
author_role author
author2 Leite,Valderí D.
Santana,Renato A.C. de
Brito,Joelma B.
author2_role author
author
author
dc.contributor.author.fl_str_mv Prasad,Shiva
Leite,Valderí D.
Santana,Renato A.C. de
Brito,Joelma B.
dc.subject.por.fl_str_mv molybdates
lanthanum molybdates
electrometry
topic molybdates
lanthanum molybdates
electrometry
description The precise nature of the reaction between lanthanum nitrate and sodium molybdate at specific pH levels 7.6, 5.5 and 4.1 has been studied by means of electrometric techniques involving potentiometric and conductometric titrations, in aqueous and alcoholic media using each reagent as titrant. Well-defined breaks and inflections in the titration curves provide cogent evidence for formation and precipitation of lanthanum normal-La2O3.3MoO3, para- La2O3.7MoO3 and octa-2 La2O3.24MoO3 molybdates in the vicinity of pH 5.9, 4.8 and 4.2, respectively. Analytical investigations of the precipitates of lanthanum molybdates have also been carried out, which substantiate the results of the electrometric study.
publishDate 2004
dc.date.none.fl_str_mv 2004-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000200014
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000200014
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532004000200014
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.15 n.2 2004
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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