Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado

Detalhes bibliográficos
Autor(a) principal: Santos,Anderson R. dos
Data de Publicação: 2002
Outros Autores: Vidotti,Eliane C., Silva,Expedito L., Maionchi,Florângela, Hioka,Noboru
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000500022
Resumo: We intend to divulge an easy experiment that permits the determination of molar masses of various compounds by cryoscopy. The major advantage of this is the use of the tert-butyl alcohol as a solvent, which requires simple apparatus and easy procedures. The melting point of this alcohol is around 25 ºC, which makes it easy to freeze and then melt the solutions. This solvent has a high cryoscopic constant and is miscible with both polar and non-polar compounds. The molar masses of acetone, water, chloroform, dichloro-methane, ethanol, hexane, carbon tetrachloride and toluene were determined. The results were good except for water. Even though there are reliable techniques of molar mass determination nowadays, this method is still frequently taught in undergraduate courses.
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spelling Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequadotert-butyl alcoholcryoscopymolar mass determinationWe intend to divulge an easy experiment that permits the determination of molar masses of various compounds by cryoscopy. The major advantage of this is the use of the tert-butyl alcohol as a solvent, which requires simple apparatus and easy procedures. The melting point of this alcohol is around 25 ºC, which makes it easy to freeze and then melt the solutions. This solvent has a high cryoscopic constant and is miscible with both polar and non-polar compounds. The molar masses of acetone, water, chloroform, dichloro-methane, ethanol, hexane, carbon tetrachloride and toluene were determined. The results were good except for water. Even though there are reliable techniques of molar mass determination nowadays, this method is still frequently taught in undergraduate courses.Sociedade Brasileira de Química2002-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000500022Química Nova v.25 n.5 2002reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422002000500022info:eu-repo/semantics/openAccessSantos,Anderson R. dosVidotti,Eliane C.Silva,Expedito L.Maionchi,FlorângelaHioka,Noborupor2002-11-13T00:00:00Zoai:scielo:S0100-40422002000500022Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2002-11-13T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
title Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
spellingShingle Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
Santos,Anderson R. dos
tert-butyl alcohol
cryoscopy
molar mass determination
title_short Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
title_full Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
title_fullStr Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
title_full_unstemmed Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
title_sort Determinação da massa molar por crioscopia: terc-butanol, um solvente extremamente adequado
author Santos,Anderson R. dos
author_facet Santos,Anderson R. dos
Vidotti,Eliane C.
Silva,Expedito L.
Maionchi,Florângela
Hioka,Noboru
author_role author
author2 Vidotti,Eliane C.
Silva,Expedito L.
Maionchi,Florângela
Hioka,Noboru
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Santos,Anderson R. dos
Vidotti,Eliane C.
Silva,Expedito L.
Maionchi,Florângela
Hioka,Noboru
dc.subject.por.fl_str_mv tert-butyl alcohol
cryoscopy
molar mass determination
topic tert-butyl alcohol
cryoscopy
molar mass determination
description We intend to divulge an easy experiment that permits the determination of molar masses of various compounds by cryoscopy. The major advantage of this is the use of the tert-butyl alcohol as a solvent, which requires simple apparatus and easy procedures. The melting point of this alcohol is around 25 ºC, which makes it easy to freeze and then melt the solutions. This solvent has a high cryoscopic constant and is miscible with both polar and non-polar compounds. The molar masses of acetone, water, chloroform, dichloro-methane, ethanol, hexane, carbon tetrachloride and toluene were determined. The results were good except for water. Even though there are reliable techniques of molar mass determination nowadays, this method is still frequently taught in undergraduate courses.
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=S0100-40422002000500022
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000500022
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422002000500022
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 Química Nova v.25 n.5 2002
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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