Investigations on the Formation of Copper Polyvanadates as a Function of pH
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , |
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=S0103-50532002000500012 |
Resumo: | The formation and composition of copper vanadates obtained by the interaction of copper sulfate with different sodium vanadates (ortho, pyro, meta and poly) have been studied by means of electrometric techniques involving glass electrode and conductometric titrations between the reactants at several concentrations in aqueous and aqueous-ethanolic media. The well defined inflections and breaks in the titration curves provide cogent evidence for the formation and precipitation of copper ortho-3CuO.V2O5, pyro-2CuO.V2O5 and meta-CuO.V2O5 vanadates in the vicinity of pH 8.1, 7.4 and 6.2, respectively. The studies on formation of copper poly-vanadate failed to give any dependable results. Analytical investigations of the compounds formed confirm the results of the electrometric study. The precipitation of copper ortho-vanadate is almost quantitative and the glass electrode titrations ofers a simple and rapid method for determination of vanadium(V) in solutions. |
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Journal of the Brazilian Chemical Society (Online) |
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Investigations on the Formation of Copper Polyvanadates as a Function of pHpolyvanadatesvanadatescopperelectrometryThe formation and composition of copper vanadates obtained by the interaction of copper sulfate with different sodium vanadates (ortho, pyro, meta and poly) have been studied by means of electrometric techniques involving glass electrode and conductometric titrations between the reactants at several concentrations in aqueous and aqueous-ethanolic media. The well defined inflections and breaks in the titration curves provide cogent evidence for the formation and precipitation of copper ortho-3CuO.V2O5, pyro-2CuO.V2O5 and meta-CuO.V2O5 vanadates in the vicinity of pH 8.1, 7.4 and 6.2, respectively. The studies on formation of copper poly-vanadate failed to give any dependable results. Analytical investigations of the compounds formed confirm the results of the electrometric study. The precipitation of copper ortho-vanadate is almost quantitative and the glass electrode titrations ofers a simple and rapid method for determination of vanadium(V) in solutions.Sociedade Brasileira de Química2002-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532002000500012Journal of the Brazilian Chemical Society v.13 n.5 2002reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532002000500012info:eu-repo/semantics/openAccessPrasad,ShivaBrito,André L. F.Muniz,Ana C. S.Leite,Valderí D.eng2008-10-08T00:00:00Zoai:scielo:S0103-50532002000500012Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2008-10-08T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Investigations on the Formation of Copper Polyvanadates as a Function of pH |
title |
Investigations on the Formation of Copper Polyvanadates as a Function of pH |
spellingShingle |
Investigations on the Formation of Copper Polyvanadates as a Function of pH Prasad,Shiva polyvanadates vanadates copper electrometry |
title_short |
Investigations on the Formation of Copper Polyvanadates as a Function of pH |
title_full |
Investigations on the Formation of Copper Polyvanadates as a Function of pH |
title_fullStr |
Investigations on the Formation of Copper Polyvanadates as a Function of pH |
title_full_unstemmed |
Investigations on the Formation of Copper Polyvanadates as a Function of pH |
title_sort |
Investigations on the Formation of Copper Polyvanadates as a Function of pH |
author |
Prasad,Shiva |
author_facet |
Prasad,Shiva Brito,André L. F. Muniz,Ana C. S. Leite,Valderí D. |
author_role |
author |
author2 |
Brito,André L. F. Muniz,Ana C. S. Leite,Valderí D. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Prasad,Shiva Brito,André L. F. Muniz,Ana C. S. Leite,Valderí D. |
dc.subject.por.fl_str_mv |
polyvanadates vanadates copper electrometry |
topic |
polyvanadates vanadates copper electrometry |
description |
The formation and composition of copper vanadates obtained by the interaction of copper sulfate with different sodium vanadates (ortho, pyro, meta and poly) have been studied by means of electrometric techniques involving glass electrode and conductometric titrations between the reactants at several concentrations in aqueous and aqueous-ethanolic media. The well defined inflections and breaks in the titration curves provide cogent evidence for the formation and precipitation of copper ortho-3CuO.V2O5, pyro-2CuO.V2O5 and meta-CuO.V2O5 vanadates in the vicinity of pH 8.1, 7.4 and 6.2, respectively. The studies on formation of copper poly-vanadate failed to give any dependable results. Analytical investigations of the compounds formed confirm the results of the electrometric study. The precipitation of copper ortho-vanadate is almost quantitative and the glass electrode titrations ofers a simple and rapid method for determination of vanadium(V) in solutions. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-09-01 |
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=S0103-50532002000500012 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532002000500012 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532002000500012 |
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.13 n.5 2002 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 |
_version_ |
1750318164946714624 |