{"id":3510,"date":"2015-06-29T16:21:23","date_gmt":"2015-06-29T19:21:23","guid":{"rendered":"http:\/\/quiprocura.net\/w\/?p=3510"},"modified":"2019-06-25T20:25:24","modified_gmt":"2019-06-25T23:25:24","slug":"definicao-acido-base-de-pearson","status":"publish","type":"post","link":"https:\/\/quiprocura.net\/w\/2015\/06\/29\/definicao-acido-base-de-pearson\/","title":{"rendered":"Defini\u00e7\u00e3o \u00c1cido-Base de Pearson"},"content":{"rendered":"<p><span style=\"color: #111111; font-family: Roboto, sans-serif; font-size: 27px;\">\u00c1cido e base dura e macia<\/span><\/p>\n<p>Esta denomina\u00e7\u00e3o nasceu da <a href=\"http:\/\/quiprocura.net\/w\/2015\/12\/06\/quimica-uma-ciencia-desconhecida\/\" target=\"_blank\" rel=\"noopener noreferrer\">qu\u00edmica<\/a>\u00a0de coordena\u00e7\u00e3o, ou seja, observou-se que alguns ligantes <span class=\"SpellE\">possu\u00edam<\/span> prefer\u00eancia em reagir com alguns metais e que <span class=\"GramE\">outro grupo de ligantes preferiam<\/span> coordenar com um segundo grupo de metais.<\/p>\n<p>Um exemplo \u00e9 a <span class=\"SpellE\">fosfina<\/span> que prefere coordenar com Hg<sup>2+<\/sup> e a am\u00f4nia que prefere coordenar com o Be<sup>2+<\/sup>.<\/p>\n<p>Pearson verificou esta tend\u00eancia e sugeriu <span class=\"GramE\">a denomina\u00e7\u00e3o &#8220;duro&#8221; e &#8220;macio&#8221; ou &#8220;mole&#8221; para classificar os elementos dos grupos<\/span>.<\/p>\n<p><strong><em><a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/29\/definicoes-acido-base\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span class=\"GramE\">\u00e1cidos<\/span><\/a> duros<\/em><\/strong>: s\u00e3o \u00edons met\u00e1licos, que incluem os alcalinos, os alcalinos terrosos, os \u00edons met\u00e1licos de alto estado de oxida\u00e7\u00e3o, esp\u00e9cies de baixa eletronegatividade e tamanho pequeno.<\/p>\n<p>Ex.: Eu<sup>3+<\/sup>, Ca<sup>2+<\/sup>, Na<sup>+<\/sup>, Mg<sup>2+<\/sup>, Sc<sup>3+<\/sup>, La<sup>3+<\/sup>, Ce<sup>4+<\/sup>, K<sup>+<\/sup>, Co<sup>3+<\/sup>, Ti<sup>4+<\/sup>, Cr<sup>3+<\/sup>, Fe<sup>3+<\/sup>, Li<sup>+<\/sup>, Be<sup>2+<\/sup>, Sr<sup>2+<\/sup>, Zr<sup>4+<\/sup>, Cr<sup>6+<\/sup>, Mn<sup>2+<\/sup>, Mn<sup>7+<\/sup>, Sn<sup>4+<\/sup>, Si<sup>4+<\/sup>, As<sup>3+<\/sup>, Ga<sup>3+<\/sup>, N<sup>3+<\/sup>, Cl<sup>3+<\/sup>, Cl<sup>7+<\/sup>, I<sup>5+<\/sup>, I<sup>7+<\/sup>, etc.<\/p>\n<p><strong><em><span class=\"GramE\">bases<\/span> duras<\/em><\/strong>: s\u00e3o esp\u00e9cies que doam el\u00e9trons, possuem alta eletronegatividade e possuem baixa polarizabilidade.<\/p>\n<p>Ex.: F<sup>&#8211;<\/sup>, NH<sub>3<\/sub>, O<sup>2-<\/sup>, H<sub>2<\/sub>O, SO<sub>4<\/sub><sup>2-<\/sup>, NO<sub>3<\/sub><sup>&#8211;<\/sup>, ClO<sub>4<\/sub><sup>&#8211;<\/sup>, CO<sub>3<\/sub><sup>2-<\/sup>, OH<sup>&#8211;<\/sup>, RNH<sub>2<\/sub>, CH<sub>3<\/sub>COO<sup>&#8211;<\/sup>, PO<sub>4<\/sub><sup>3-<\/sup>, N<sub>2<\/sub>H<sub>4<\/sub>, ROH, RO<sup>&#8211;<\/sup>, R<sub>2<\/sub>O, etc.<\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block; text-align: center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-5517334625230773\" data-ad-slot=\"7491938137\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<p><strong><em><span class=\"GramE\">\u00e1cidos<\/span> macios<\/em><\/strong>: s\u00e3o esp\u00e9cies de tamanho grande, com baixo estado de oxida\u00e7\u00e3o, de m\u00e9dia eletronegatividade, possui baixa capacidade <span class=\"SpellE\">polarizante<\/span>.<\/p>\n<p>Ex.: Pd<sup>2+<\/sup>, Pt<sup>2+<\/sup>, Pt<sup>4+<\/sup>, Cu<sup>+<\/sup>, <span class=\"SpellE\">Ag<\/span><sup>+<\/sup>, <span class=\"SpellE\">Au<\/span><sup>+<\/sup>, Cd<sup>2+<\/sup>, Hg<sup>+<\/sup>, Hg<sup>2+<\/sup>, <span class=\"GramE\">CH<sub>3<\/sub>Hg<\/span><sup>+<\/sup>, <span class=\"SpellE\">Tl<\/span><sup>+<\/sup>, CH<sub>2<\/sub>, O, Cl, <span class=\"SpellE\">Br<\/span>, I, N, RO., RO<sub>2<\/sub>.<\/p>\n<p><strong><em><span class=\"GramE\">bases<\/span> macias<\/em><\/strong>: s\u00e3o esp\u00e9cies que recebem el\u00e9trons, possui baixa eletronegatividade e alta polarizabilidade.<\/p>\n<p>Ex.: H<sup>&#8211;<\/sup>, R<sup>&#8211;<\/sup>,C<sub>2<\/sub>H<sub>4<\/sub>, C<sub>6<\/sub>H<sub>6<\/sub>, CN<sup>&#8211;<\/sup>, CO, SCN<sup>&#8211;<\/sup>, I<sup>&#8211;<\/sup>, R<sub>3<\/sub>P, R<sub>2<\/sub>S, RS<sup>&#8211;<\/sup>, R<sub>3<\/sub>As<\/p>\n<p>Com estas classifica\u00e7\u00f5es, se torna poss\u00edvel a verifica\u00e7\u00e3o de prefer\u00eancia de uma rea\u00e7\u00e3o, onde um <strong>\u00e1cido duro<\/strong> reage com uma <strong>base dura<\/strong> e um <strong>\u00e1cido macio<\/strong> reage com uma <strong>base macia<\/strong>.<br \/>\nQuando um \u00e1cido duro reage com uma base dura <span class=\"GramE\">a<\/span> liga\u00e7\u00e3o formada \u00e9 de car\u00e1ter i\u00f4nico e quando um \u00e1cido macio reage com uma base macia, a liga\u00e7\u00e3o formada possui car\u00e1ter covalente.<\/p>\n<p>Estes conceitos de dureza e maciez s\u00e3o relativos, ou seja, eles n\u00e3o s\u00e3o r\u00edgidos, mas sim, relativos <span class=\"GramE\">\u00e0<\/span> um outro \u00e1cido ou base. Um exemplo \u00e9 o \u00edon c\u00e9sio que \u00e9, geralmente, mais macio que o \u00edon l\u00edtio e ambos s\u00e3o metais alcalinos, que possuem uma relativa dureza.<\/p>\n<p><strong>\u00e1cidos intermedi\u00e1rios<\/strong>: Fe<sup>2+<\/sup>, Co<sup>2+<\/sup>, Ni<sup>2+<\/sup>, Cu<sup>2+<\/sup>, Zn<sup>2+<\/sup>, NO<sup>+<\/sup>, Sb<sup>3+<\/sup>, SO<sub>2<\/sub>, Pb<sup>2+<\/sup>, Os<sup>2<span class=\"GramE\">+<\/span><\/sup><\/p>\n<p><strong><span class=\"GramE\">bases<\/span> intermedi\u00e1rias<\/strong>: NO<sub>2<\/sub><sup>&#8211;<\/sup>, SO<sub>3<\/sub><sup>2-<\/sup>, <span class=\"SpellE\">Br<\/span><sup>&#8211;<\/sup>, N<sub>2<\/sub>, N<sub>3<\/sub><sup>&#8211;<\/sup><sub>, <\/sub>C<sub>6<\/sub>H<sub>5<\/sub>NH<sub>2<\/sub>, C<sub>5<\/sub>H<sub>5<\/sub>N.<\/p>\n<p><b>Escrito por:<\/b> <a href=\"http:\/\/quiprocura.net\/w\/author\/miguel-medeiros\/\" target=\"_blank\" rel=\"noopener noreferrer\">Miguel A.\u00a0Medeiros<\/a><br \/>\n<b>Revisado\u00a0em:<\/b> 29 de junho de 2015<\/p>\n<p><a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/29\/definicoes-acido-base\/\">Defini\u00e7\u00f5es \u00c1cido-Base<br \/>\n<\/a><a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/29\/definicao-acido-base-de-arrhenius\/\">Defini\u00e7\u00e3o \u00c1cido-Base de Arrhenius<br \/>\n<\/a><a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/29\/definicao-acido-base-de-bronsted-lowry\/\">Defini\u00e7\u00e3o \u00c1cido-Base de Bronsted-Lowry<\/a><br \/>\n<a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/29\/definicoes-acido-base-de-lewis\/\">Defini\u00e7\u00e3o \u00c1cido-Base de Lewis<\/a><br \/>\n<a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/29\/definicao-acido-base-de-pearson\/\">Defini\u00e7\u00e3o \u00c1cido-Base de Pearson<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c1cido e base dura e macia Esta denomina\u00e7\u00e3o nasceu da qu\u00edmica\u00a0de coordena\u00e7\u00e3o, ou seja, observou-se que alguns ligantes possu\u00edam prefer\u00eancia em reagir com alguns metais e que outro grupo de ligantes preferiam coordenar com um segundo grupo de metais. Um exemplo \u00e9 a fosfina que prefere coordenar com Hg2+ e a am\u00f4nia que prefere coordenar [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"footnotes":""},"categories":[2],"tags":[123,268,260,265,279,266],"class_list":["post-3510","post","type-post","status-publish","format-gallery","hentry","category-conteudos-curriculares","tag-acido","tag-basicidade","tag-basico","tag-duro","tag-macio","tag-mole","post_format-post-format-gallery"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Defini\u00e7\u00e3o \u00c1cido-Base de Pearson - QuiProcura<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/quiprocura.net\/w\/2015\/06\/29\/definicao-acido-base-de-pearson\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Defini\u00e7\u00e3o \u00c1cido-Base de Pearson - QuiProcura\" \/>\n<meta property=\"og:description\" content=\"\u00c1cido e base dura e macia Esta denomina\u00e7\u00e3o nasceu da qu\u00edmica\u00a0de coordena\u00e7\u00e3o, ou seja, observou-se que alguns ligantes possu\u00edam prefer\u00eancia em reagir com alguns metais e que outro grupo de ligantes preferiam coordenar com um segundo grupo de metais. 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