{"id":358,"date":"2023-07-23T22:07:42","date_gmt":"2023-07-23T22:07:42","guid":{"rendered":"https:\/\/chemuza.org\/pt\/acido-acetico-glacial\/"},"modified":"2023-07-23T22:07:42","modified_gmt":"2023-07-23T22:07:42","slug":"acido-acetico-glacial","status":"publish","type":"post","link":"https:\/\/chemuza.org\/pt\/acido-acetico-glacial\/","title":{"rendered":"\u00c1cido ac\u00e9tico glacial \u2013 c2h4o2, 64-19-7"},"content":{"rendered":"<p>O \u00e1cido ac\u00e9tico glacial \u00e9 uma forma altamente concentrada de \u00e1cido ac\u00e9tico, normalmente contendo 99,5 a 100% de \u00e1cido ac\u00e9tico. \u00c9 um l\u00edquido incolor com odor forte e pungente.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td> <strong>Nome IUPAC<\/strong><\/td>\n<td> \u00c1cido ac\u00e9tico<\/td>\n<\/tr>\n<tr>\n<td> <strong>F\u00f3rmula molecular<\/strong><\/td>\n<td> C2H4O2<\/td>\n<\/tr>\n<tr>\n<td> <strong>N\u00famero CAS<\/strong><\/td>\n<td> 64-19-7<\/td>\n<\/tr>\n<tr>\n<td> <strong>Sin\u00f4nimos<\/strong><\/td>\n<td> \u00c1cido ac\u00e9tico, \u00e1cido etan\u00f3lico, \u00e1cido metanocarbox\u00edlico, \u00e1cido ac\u00e9tico<\/td>\n<\/tr>\n<tr>\n<td> <strong>InChI<\/strong><\/td>\n<td> InChI=1S\/C2H4O2\/c1-2(3)4\/h1H3,(H,3,4)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\"> <strong>Propriedades do \u00e1cido ac\u00e9tico<\/strong> <\/h2>\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/acetic-acid.jpg\" alt=\"\u00c1cido ac\u00e9tico glacial\" width=\"204\" height=\"136\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<\/div>\n<h3 class=\"wp-block-heading\"> Massa molar de \u00e1cido ac\u00e9tico glacial<\/h3>\n<p> A massa molar do \u00e1cido ac\u00e9tico glacial \u00e9 60,05 g\/mol. Isso significa que um mol de \u00e1cido ac\u00e9tico pesa 60,05 gramas. A massa molar \u00e9 calculada somando os pesos at\u00f4micos de todos os \u00e1tomos da f\u00f3rmula qu\u00edmica, que neste caso \u00e9 C2H4O2.<\/p>\n<h3 class=\"wp-block-heading\"> Ponto de ebuli\u00e7\u00e3o do \u00e1cido ac\u00e9tico glacial<\/h3>\n<p> O ponto de ebuli\u00e7\u00e3o do \u00e1cido ac\u00e9tico \u00e9 118,1\u00b0C (244,58\u00b0F). Isto significa que a esta temperatura, o \u00e1cido ac\u00e9tico muda do estado l\u00edquido para o gasoso. O ponto de ebuli\u00e7\u00e3o de uma subst\u00e2ncia \u00e9 afetado por v\u00e1rios fatores, como press\u00e3o e impurezas, mas o \u00e1cido ac\u00e9tico tem um ponto de ebuli\u00e7\u00e3o relativamente baixo em compara\u00e7\u00e3o com outros compostos org\u00e2nicos.<\/p>\n<h3 class=\"wp-block-heading\"> Ponto de fus\u00e3o do \u00e1cido ac\u00e9tico glacial<\/h3>\n<p> O ponto de fus\u00e3o do \u00e1cido ac\u00e9tico \u00e9 16,73\u00b0C e o ponto de ebuli\u00e7\u00e3o normal \u00e9 117,9\u00b0C.<\/p>\n<h3 class=\"wp-block-heading\"> Densidade de \u00e1cido ac\u00e9tico glacial g\/ml<\/h3>\n<p> A densidade do \u00e1cido ac\u00e9tico \u00e9 1,049 g\/ml. Isso significa que um mililitro de \u00e1cido ac\u00e9tico pesa 1,049 gramas. A densidade de uma subst\u00e2ncia \u00e9 afetada pela sua temperatura e press\u00e3o, mas o \u00e1cido ac\u00e9tico \u00e9 relativamente denso em compara\u00e7\u00e3o com outros compostos org\u00e2nicos.<\/p>\n<h3 class=\"wp-block-heading\"> Peso molecular do \u00e1cido ac\u00e9tico glacial<\/h3>\n<p> O peso molecular do \u00e1cido ac\u00e9tico glacial \u00e9 60,05 g\/mol. Isso significa que um mol de \u00e1cido ac\u00e9tico pesa 60,05 gramas. O peso molecular de uma subst\u00e2ncia \u00e9 igual \u00e0 sua massa molar e \u00e9 calculado somando os pesos at\u00f4micos de todos os \u00e1tomos da f\u00f3rmula qu\u00edmica. No caso do \u00e1cido ac\u00e9tico, o peso molecular \u00e9 C2H4O2.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td> <strong>Apar\u00eancia<\/strong><\/td>\n<td> L\u00edquido l\u00edmpido e incolor<\/td>\n<\/tr>\n<tr>\n<td> <strong>Gravidade Espec\u00edfica<\/strong><\/td>\n<td> 1.049 (20\u00b0C)<\/td>\n<\/tr>\n<tr>\n<td> <strong>Cor<\/strong><\/td>\n<td> Claro, incolor<\/td>\n<\/tr>\n<tr>\n<td> <strong>Cheiro<\/strong><\/td>\n<td> Forte, pungente, semelhante ao vinagre<\/td>\n<\/tr>\n<tr>\n<td> <strong>Massa molar<\/strong><\/td>\n<td> 60.052 g\/mol<\/td>\n<\/tr>\n<tr>\n<td> <strong>Densidade<\/strong><\/td>\n<td> 1,05g\/cm3 (20\u00b0C)<\/td>\n<\/tr>\n<tr>\n<td> <strong>Ponto de fus\u00e3o<\/strong><\/td>\n<td> -16,6\u00baC<\/td>\n<\/tr>\n<tr>\n<td> <strong>Ponto de ebuli\u00e7\u00e3o<\/strong><\/td>\n<td> 118,1\u00baC<\/td>\n<\/tr>\n<tr>\n<td> <strong>Ponto flash<\/strong><\/td>\n<td> 16,1\u00b0C (copo fechado)<\/td>\n<\/tr>\n<tr>\n<td> <strong>Solubilidade em \u00c1gua<\/strong><\/td>\n<td> Misc\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Solubilidade<\/strong><\/td>\n<td> Misc\u00edvel com a maioria dos solventes org\u00e2nicos<\/td>\n<\/tr>\n<tr>\n<td> <strong>Press\u00e3o de vapor<\/strong><\/td>\n<td> 40,5kPa (20\u00b0C)<\/td>\n<\/tr>\n<tr>\n<td> <strong>Densidade do vapor<\/strong><\/td>\n<td> 2,02 (ar = 1)<\/td>\n<\/tr>\n<tr>\n<td> <strong>PKa<\/strong><\/td>\n<td> 4,76<\/td>\n<\/tr>\n<tr>\n<td> <strong>PH<\/strong><\/td>\n<td> 2,4 (solu\u00e7\u00e3o 1M)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\"> <strong>Seguran\u00e7a e perigos do \u00e1cido ac\u00e9tico glacial<\/strong><\/h2>\n<p> O \u00e1cido ac\u00e9tico \u00e9 uma subst\u00e2ncia altamente corrosiva e t\u00f3xica que pode causar irrita\u00e7\u00e3o grave na pele e nos olhos, queimaduras qu\u00edmicas e problemas respirat\u00f3rios se n\u00e3o for manuseado adequadamente. Deve ser sempre manuseado com luvas, \u00f3culos de prote\u00e7\u00e3o e jaleco para prote\u00e7\u00e3o contra contato com a pele e os olhos. Tamb\u00e9m deve ser armazenado em local fresco e seco, longe do calor e de chamas abertas para evitar poss\u00edveis explos\u00f5es. \u00c9 importante sempre seguir os protocolos de seguran\u00e7a adequados e usar o EPI correto ao manusear o \u00e1cido ac\u00e9tico.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td> <strong>S\u00edmbolo de perigo<\/strong><\/td>\n<td> Corrosivo<\/td>\n<\/tr>\n<tr>\n<td> <strong>Descri\u00e7\u00e3o de seguran\u00e7a<\/strong><\/td>\n<td> Pode causar queimaduras graves na pele e les\u00f5es oculares<\/td>\n<\/tr>\n<tr>\n<td> <strong>UM ID<\/strong><\/td>\n<td> UN2689<\/td>\n<\/tr>\n<tr>\n<td> <strong>C\u00f3digo SH<\/strong><\/td>\n<td> 2915.11.00<\/td>\n<\/tr>\n<tr>\n<td> <strong>Classe de perigo<\/strong><\/td>\n<td> 8<\/td>\n<\/tr>\n<tr>\n<td> <strong>Grupo de embalagem<\/strong><\/td>\n<td> II<\/td>\n<\/tr>\n<tr>\n<td> <strong>Toxicidade<\/strong><\/td>\n<td> Alto<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\"> <strong>M\u00e9todos de produ\u00e7\u00e3o de \u00e1cido ac\u00e9tico glacial<\/strong><\/h2>\n<p> O \u00e1cido ac\u00e9tico pode ser preparado pela oxida\u00e7\u00e3o de etanol ou acetalde\u00eddo. O m\u00e9todo mais comum \u00e9 a oxida\u00e7\u00e3o do etanol usando um catalisador como a cromita de cobre. A reac\u00e7\u00e3o \u00e9 geralmente realizada a alta temperatura (cerca de 200-250\u00b0C) e sob elevada press\u00e3o de oxig\u00e9nio. O l\u00edquido resultante \u00e9 ent\u00e3o destilado para separar o \u00e1cido ac\u00e9tico de qualquer etanol ou \u00e1gua restante. Outro m\u00e9todo \u00e9 a carbonila\u00e7\u00e3o do metanol usando um catalisador como o r\u00f3dio, que produz \u00e1cido ac\u00e9tico como subproduto. Ambos os m\u00e9todos requerem um controle rigoroso das condi\u00e7\u00f5es de rea\u00e7\u00e3o para atingir alta pureza do produto final.<\/p>\n<h2 class=\"wp-block-heading\"> <strong>Usos do \u00e1cido ac\u00e9tico glacial<\/strong><\/h2>\n<p> O \u00e1cido ac\u00e9tico \u00e9 usado em qu\u00edmica anal\u00edtica para a estimativa de subst\u00e2ncias fracamente alcalinas, como amidas org\u00e2nicas. O \u00e1cido ac\u00e9tico \u00e9 uma base muito mais fraca que a \u00e1gua, ent\u00e3o a amida se comporta como uma base forte neste meio. O \u00e1cido ac\u00e9tico dilu\u00eddo \u00e9 usado na preserva\u00e7\u00e3o e enlatamento de picles e outros vegetais. Tamb\u00e9m \u00e9 usado como raspador para limpeza. Al\u00e9m de limpar e enlatar, o \u00e1cido ac\u00e9tico dilu\u00eddo pode tratar ou prevenir infec\u00e7\u00f5es bacterianas ou f\u00fangicas do ouvido externo.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>O \u00e1cido ac\u00e9tico glacial \u00e9 uma forma altamente concentrada de \u00e1cido ac\u00e9tico, normalmente contendo 99,5 a 100% de \u00e1cido ac\u00e9tico. \u00c9 um l\u00edquido incolor com odor forte e pungente. Nome IUPAC \u00c1cido ac\u00e9tico F\u00f3rmula molecular C2H4O2 N\u00famero CAS 64-19-7 Sin\u00f4nimos \u00c1cido ac\u00e9tico, \u00e1cido etan\u00f3lico, \u00e1cido metanocarbox\u00edlico, \u00e1cido ac\u00e9tico InChI InChI=1S\/C2H4O2\/c1-2(3)4\/h1H3,(H,3,4) Propriedades do \u00e1cido ac\u00e9tico Massa &#8230; <a title=\"\u00c1cido ac\u00e9tico glacial \u2013 c2h4o2, 64-19-7\" class=\"read-more\" href=\"https:\/\/chemuza.org\/pt\/acido-acetico-glacial\/\" aria-label=\"Mais em \u00c1cido ac\u00e9tico glacial \u2013 c2h4o2, 64-19-7\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-358","post","type-post","status-publish","format-standard","hentry","category-produtos-quimicos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u00c1cido ac\u00e9tico glacial - 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