{"id":72561,"date":"2022-07-28T17:00:00","date_gmt":"2022-07-28T20:00:00","guid":{"rendered":"https:\/\/vestibulares.estrategia.com\/portal\/?p=72561"},"modified":"2023-05-04T10:15:12","modified_gmt":"2023-05-04T13:15:12","slug":"acidos","status":"publish","type":"post","link":"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/","title":{"rendered":"\u00c1cidos: classifica\u00e7\u00f5es, nomenclatura e mais!"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Quando falamos no tema &ldquo;&aacute;cidos&rdquo;, &eacute; comum se lembrar de alimentos como lim&otilde;es, laranjas e abacaxis. Muito al&eacute;m de alguns sabores cl&aacute;ssicos, eles s&atilde;o <span id=\"urn:enhancement-22fc009b-30e8-4b67-b503-6e054de8a000\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncias<\/span> qu&iacute;micas estudadas quanto ao seu comportamento em meio aquoso, suas rea&ccedil;&otilde;es com bases e sua fun&ccedil;&atilde;o na forma&ccedil;&atilde;o dos sais.&nbsp;<p class=\"wp-block-paragraph\">Continue lendo e saiba mais sobre as caracter&iacute;sticas dos &aacute;cidos, quais s&atilde;o as teorias por tr&aacute;s desses compostos qu&iacute;micos, qual a nomenclatura padr&atilde;o utilizada, entre outras informa&ccedil;&otilde;es essenciais para o conhecimento pr&eacute;-<span id=\"urn:enhancement-ee32cde8-f908-462c-88a4-25c763e23fbe\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/vestibular\">vestibular<\/span>. Acompanhe, ao final, a resolu&ccedil;&atilde;o e gabarito de uma quest&atilde;o do <span id=\"urn:enhancement-ac586f2b-c834-450d-942d-9c1e2900f3ae\" class=\"textannotation disambiguated wl-event\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/enem-64632\">Enem<\/span> sobre esse tema.&nbsp;<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Navegue pelo conte\u00fado<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/#Teorias-quimicas-para-definicao-de-acidos\" >Teorias qu&iacute;micas para defini&ccedil;&atilde;o de &aacute;cidos<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/#Caracteristicas-dos-acidos\" >Caracter&iacute;sticas dos &aacute;cidos<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/#Nomenclatura-dos-acidos\" >Nomenclatura dos &aacute;cidos<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/#Compostos-acidos-famosos\" >Compostos &aacute;cidos famosos<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/#Questao-do-Enem\" >Quest&atilde;o do Enem:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/#Estude-mais-de-quimica-com-a-Coruja\" >Estude mais de qu&iacute;mica com a Coruja!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidos\/#Veja-tambem\" >Veja tamb&eacute;m:<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-teorias-quimicas-para-definicao-de-acidos\"><span class=\"ez-toc-section\" id=\"Teorias-quimicas-para-definicao-de-acidos\"><\/span>Teorias qu&iacute;micas para defini&ccedil;&atilde;o de &aacute;cidos<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Para determinar se uma <span id=\"urn:enhancement-b3519ab3-d377-4274-adc5-77e1f37ac9a6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncia<\/span> tem caracter&iacute;sticas &aacute;cidas ou b&aacute;sicas, foram estipuladas algumas teorias, que auxiliam na compreens&atilde;o desses compostos qu&iacute;micos. Acompanhe, a seguir, o que s&atilde;o estes compostos a partir das ideias de <span id=\"urn:enhancement-fb4ffde2-b120-46e8-b8d5-214b70cbf1a1\" class=\"textannotation disambiguated wl-person\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/svante-arrhenius\">Arrhenius<\/span>, Bronsted-Lowry e Lewis.&nbsp;<\/p><h3 class=\"wp-block-heading\" id=\"h-teoria-de-arrhenius\">Teoria de Arrhenius&nbsp;<\/h3><p class=\"wp-block-paragraph\">Na <span id=\"urn:enhancement-46246184-f27f-4def-9f94-64f331b8cb88\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/teoria-de-arrhenius\">teoria de Arrhenius<\/span>, os compostos &aacute;cidos s&atilde;o capazes de doar um pr&oacute;ton de hidrog&ecirc;nio (H<sup>+<\/sup>). Ao passo que os b&aacute;sicos s&atilde;o aqueles que liberam <span id=\"urn:enhancement-f10d2171-aa7a-4c14-9736-de5562bdedea\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidroxila\">OH<\/span><sup>&ndash;<\/sup> (&acirc;nion <span id=\"urn:enhancement-500e7fd1-c727-4c83-aaf6-45223c9a5c69\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidroxila\">hidroxila<\/span>) nas rea&ccedil;&otilde;es qu&iacute;micas.&nbsp;<\/p><h3 class=\"wp-block-heading\" id=\"h-teoria-de-bronsted-lowry\">Teoria de Bronsted-Lowry&nbsp;<\/h3><p class=\"wp-block-paragraph\">Segundo a <span id=\"urn:local-annotation-818510\" class=\"textannotation disambiguated wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/teoria-acido-base-de-bronsted-lowry\">teoria de Bronsted-Lowry<\/span>, ainda temos a ideia de que os &aacute;cidos s&atilde;o os compostos que liberam pr&oacute;tons H<sup>+<\/sup> no meio.&nbsp; Entretanto, nesse caso, as bases s&atilde;o aquelas <span id=\"urn:enhancement-869fedf0-07e6-4260-9689-cddc8440d691\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncias<\/span> que recebem esses pr&oacute;tons do entorno.<\/p><h3 class=\"wp-block-heading\" id=\"h-teoria-de-lewis\">Teoria de Lewis<\/h3><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-178c7c6b-c8de-45b3-9841-506c3b090a15\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/teoria-acido-base-de-lewis-77157\">teoria &aacute;cido-base de Lewis<\/span> traz novos conceitos: os &aacute;cidos s&atilde;o aqueles que aceitam pares eletr&ocirc;nicos do meio em que est&atilde;o inseridos. Do lado oposto, as <span id=\"urn:enhancement-7bf3a46f-1472-4400-831b-17be8ca65b57\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncias<\/span> b&aacute;sicas s&atilde;o as respons&aacute;veis pela doa&ccedil;&atilde;o de el&eacute;trons.<\/p><h3 class=\"wp-block-heading\" id=\"h-diferenca-entre-acidos-e-bases\">Diferen&ccedil;a entre &aacute;cidos e bases<\/h3><p class=\"wp-block-paragraph\">Para refor&ccedil;ar a ideia da diferen&ccedil;a entre &aacute;cidos e bases, entenda o diagrama da imagem abaixo. A letra &ldquo;A&rdquo;&nbsp; &eacute; utilizada para representar os &aacute;cidos, e &ldquo;B&rdquo; s&atilde;o s&iacute;mbolos para as bases&nbsp; &mdash; ou mesmo as hidroxilas e os pr&oacute;tons H<sup>+<\/sup>.<\/p><p class=\"wp-block-paragraph\">Perceba que, cada teoria tem um pouco das ideias utilizadas na anterior, por isso est&atilde;o em c&iacute;rculos &ldquo;um dentro do outro&rdquo;.&nbsp;<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/E_M0TZTqNRXPRptnjSF4ihftpdeOkjVdgzs_jQW4SrS9MzarxG83D4viNMuj-J2fX8xbosDFrGfcD57AF6SqFs6WGILg-ow4yVnJCrDR5EwZVwnqH5bieffm7UZ6FQshnSaRKzTVbYG6TVOKh32Bhg4\" alt=\"Teorias de &aacute;cidos\"><figcaption class=\"wp-element-caption\">Imagem: Reprodu&ccedil;&atilde;o\/Wikimedia<br><\/figcaption><\/figure>\n<\/div><h2 class=\"wp-block-heading\" id=\"h-caracteristicas-dos-acidos\"><span class=\"ez-toc-section\" id=\"Caracteristicas-dos-acidos\"><\/span>Caracter&iacute;sticas dos &aacute;cidos<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Entre as primeiras caracter&iacute;sticas, podemos citar seu <span id=\"urn:enhancement-31251909-069e-4530-b491-5ea15588ba6f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencial-hidrogenionico\">potencial hidrogeni&ocirc;nico<\/span> (<span id=\"urn:enhancement-210afac3-eb90-41fc-b044-af6c9d821642\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencial-hidrogenionico\">pH<\/span>), que deve estar sempre no intervalo 1&lt;<span id=\"urn:enhancement-8e110fae-cd1d-4c6f-b32c-d99b12aed61d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencial-hidrogenionico\">pH<\/span> <span id=\"urn:enhancement-3638f66e-3767-442e-97bd-a122c7998f33\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span>&lt;7.&nbsp;<\/p><p class=\"wp-block-paragraph\">Essa <span id=\"urn:enhancement-04e681a4-cd4c-4566-b09e-53088fbe148c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/cursos-de-graduacao\">gradua&ccedil;&atilde;o<\/span> &eacute; dada de <span id=\"urn:enhancement-9a8787e7-07c7-41ec-9a19-e00a6479a8c6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/geometria\">forma<\/span> que quanto mais pr&oacute;ximo de 7, menor a propriedade &aacute;cida. Ao mesmo tempo, quanto menor o valor do <span id=\"urn:enhancement-c5fab860-a1f5-4bd5-9159-aa0b46c392d5\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencial-hidrogenionico\">pH<\/span>, mais &aacute;cida &eacute; a <span id=\"urn:enhancement-a4e66169-dacc-441a-ac8d-db4995519ff3\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncia<\/span>.&nbsp;<\/p><p class=\"wp-block-paragraph\">O odor liberado pelos &aacute;cidos &eacute; forte, e seu sabor &eacute; classicamente azedo ou amargo. Em termos f&iacute;sico-qu&iacute;micos, ele tem <span id=\"urn:enhancement-7290dcd1-22be-45b7-8c35-0ca438de6988\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/pontos\">pontos<\/span> de <span id=\"urn:enhancement-971d5a3d-4024-49b7-bef8-3f41b1839efc\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/fusao\">fus&atilde;o<\/span> e ebuli&ccedil;&atilde;o baixos.&nbsp;<\/p><p class=\"wp-block-paragraph\">Em meio aquoso, as <span id=\"urn:enhancement-04285abd-e7d1-42d5-80a6-5b089e902419\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncias<\/span> &aacute;cidas atuam de <span id=\"urn:enhancement-58ca8654-1e2b-4a26-8f44-5df17d76eb96\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/geometria\">forma<\/span> a favorecer a condu&ccedil;&atilde;o de corrente el&eacute;trica.&nbsp;<\/p><h2 class=\"wp-block-heading\" id=\"h-nomenclatura-dos-acidos\"><span class=\"ez-toc-section\" id=\"Nomenclatura-dos-acidos\"><\/span>Nomenclatura dos &aacute;cidos<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">O primeiro termo do nome de um <span id=\"urn:enhancement-9a81db6a-9442-453e-862b-8d63d3f56b0f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span> ser&aacute;, justamente, a palavra <span id=\"urn:enhancement-fe47352f-d5b5-440a-8efd-67875d06585b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span>. Depois, eles ser&atilde;o divididos em dois grandes grupos, como voc&ecirc; pode ver nos t&oacute;picos abaixo.<\/p><h3 class=\"wp-block-heading\" id=\"h-hidracidos\">Hidr&aacute;cidos<\/h3><p class=\"wp-block-paragraph\"><span id=\"urn:enhancement-3a9e2970-0cd7-4643-b566-f0f88d881b56\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidracidos\">Hidr&aacute;cidos<\/span> s&atilde;o compostos que n&atilde;o possuem &aacute;tomos de oxig&ecirc;nio em suas mol&eacute;culas. A nomenclatura adotada nesses casos &eacute; a seguinte:<\/p><p class=\"wp-block-paragraph\"><span id=\"urn:enhancement-5026a319-96ad-4ed5-8981-d74a3a9e1a40\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span> + nome do &acirc;nion + sufixo &iacute;drico<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>&Acirc;nion<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Nome do <span id=\"urn:enhancement-d31b07e2-3bc0-45b2-a330-34cdb5b59fa4\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span><\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Cloreto<\/td><td class=\"has-text-align-center\" data-align=\"center\"><span id=\"urn:enhancement-2c6ff10d-ac41-463c-beab-984f52f3d1d4\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&Aacute;cido<\/span> clor&iacute;drico<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Fluoreto<\/td><td class=\"has-text-align-center\" data-align=\"center\"><span id=\"urn:enhancement-d9707b89-c450-48c2-949c-0c0b17188ae5\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&Aacute;cido<\/span> fluor&iacute;drico<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Brometo<\/td><td class=\"has-text-align-center\" data-align=\"center\"><span id=\"urn:enhancement-8c575201-8ec5-43ea-8c4c-d141b3ad5aa1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&Aacute;cido<\/span> brom&iacute;drico<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\" id=\"h-oxiacidos\">Oxi&aacute;cidos<\/h3><p class=\"wp-block-paragraph\">Os <span id=\"urn:local-annotation-987711\" class=\"textannotation disambiguated\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/oxiacidos\">oxi&aacute;cidos<\/span> dependem do <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/oxirreducao\/#Balanceamento-de-equacoes\" target=\"_blank\">n&uacute;mero de oxida&ccedil;&atilde;o<\/a> (<span id=\"urn:enhancement-1ec24444-40af-466e-b1b2-2d5d60ebce8d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/nox\">Nox<\/span>) do elemento central, j&aacute; que geralmente teremos tr&ecirc;s elementos qu&iacute;micos entremeados na mol&eacute;cula.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"576\" height=\"308\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2022\/07\/image-3.png\" alt=\"tabela: nomenclatura de &aacute;cidos\" class=\"wp-image-72562\" srcset=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2022\/07\/image-3.png 576w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2022\/07\/image-3-300x160.webp 300w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2022\/07\/image-3-380x203.webp 380w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2022\/07\/image-3-150x80.webp 150w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/><\/figure>\n<\/div><h2 class=\"wp-block-heading\" id=\"h-compostos-acidos-famosos\"><span class=\"ez-toc-section\" id=\"Compostos-acidos-famosos\"><\/span>Compostos &aacute;cidos famosos<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\">\n<li><span id=\"urn:local-annotation-283006\" class=\"textannotation disambiguated\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&Aacute;cido<\/span> carb&ocirc;nico (H<sub>2<\/sub>CO<sub>3<\/sub>): no dia a dia, esse &aacute;cido est&aacute; presente nos refrigerantes e bebidas gaseificadas. Eles ajudam na sensa&ccedil;&atilde;o de refresc&acirc;ncia causada por esses preparos;&nbsp;<\/li>\n\n\n\n<li>O b&oacute;rico (H<sub>3<\/sub>BO<sub>3<\/sub>): utilizado, principalmente, para a desinfec&ccedil;&atilde;o de feridas e les&otilde;es na pele. Atua como antiss&eacute;ptico, combatendo alguns fungos e bact&eacute;rias;<\/li>\n\n\n\n<li>&Aacute;cido asc&oacute;rbico (C<sub>6<\/sub>H<sub>8<\/sub>O<sub>6<\/sub>): &eacute; um <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidez-e-basicidade-dos-compostos-organicos\/\" target=\"_blank\">composto org&acirc;nico de car&aacute;ter &aacute;cido<\/a> conhecido como vitamina C. Presente principalmente em frutas c&iacute;tricas, como laranja, lim&atilde;o e acerola, essa subst&acirc;ncia &eacute; um importante antioxidante para o corpo humano;<\/li>\n\n\n\n<li>O ac&eacute;tico (CH<sub>3<\/sub>COOH): tamb&eacute;m org&acirc;nico, o &aacute;cido ac&eacute;tico &eacute; um dos principais componentes do vinagre, t&atilde;o importante para a alimenta&ccedil;&atilde;o humana, presente em alguns produtos qu&iacute;micos caseiros e at&eacute; mesmo como desinfectante;<\/li>\n\n\n\n<li>&Aacute;cido fosf&oacute;rico (H<sub>3<\/sub>PO<sub>4<\/sub>): presente em fertilizantes do solo, &eacute; um importante aliado da agricultura. Tamb&eacute;m pode estar presente em formula&ccedil;&otilde;es farmac&ecirc;uticas conhecidas.<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"h-questao-do-enem\"><span class=\"ez-toc-section\" id=\"Questao-do-Enem\"><\/span>Quest&atilde;o do Enem:<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\"><span id=\"urn:enhancement-77bb9665-4f8d-40af-a7e3-e986eb3eefbd\" class=\"textannotation disambiguated wl-event\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/enem-64632\">ENEM<\/span> 2013<\/p><p class=\"wp-block-paragraph\">A forma&ccedil;&atilde;o frequente de grandes volumes de pirita (FeS2) em uma variedade de dep&oacute;sitos minerais favorece a forma&ccedil;&atilde;o de solu&ccedil;&otilde;es &aacute;cidas ferruginosas, conhecidas como &ldquo;drenagem &aacute;cida de minas&rdquo;. Esse fen&ocirc;meno tem sido bastante pesquisado pelos cientistas e representa uma grande preocupa&ccedil;&atilde;o entre os impactos da minera&ccedil;&atilde;o no ambiente. Em contato com oxig&ecirc;nio, a 25<span id=\"urn:enhancement-57a3fae9-f391-41fc-b018-0e64f859897d\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celsius\">&deg;C<\/span>, a pirita sofre rea&ccedil;&atilde;o, de acordo com a equa&ccedil;&atilde;o <span id=\"urn:enhancement-b1a9f527-972b-4eae-b924-7b14983d4305\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/quimica\">qu&iacute;mica<\/span>:<\/p><p class=\"wp-block-paragraph\">4 FeS<sub>2<\/sub> (s) + 15 O<sub>2<\/sub> (g) + 2 H<sub>2<\/sub>O (l)&nbsp; &rarr;&nbsp; 2 Fe<sub>2<\/sub>(SO<sub>4<\/sub>)<sub>3<\/sub> (aq) + 2 H<sub>2<\/sub>SO<sub>4<\/sub> (aq)<\/p><p class=\"has-text-align-right wp-block-paragraph\"><em>FIGUEIREDO. B. R. Min&eacute;rios e Ambientes. Campinas. <span id=\"urn:enhancement-b46b65d8-08f9-4b14-bfe2-f2cb3e314780\" class=\"textannotation disambiguated wl-organization\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/unicamp\">Unicamp<\/span>. 2000.<\/em><\/p><p class=\"wp-block-paragraph\">Para corrigir os problemas ambientais causados por essa drenagem, a <span id=\"urn:enhancement-bc4204fd-72ec-44b4-80e9-993a1fcb29ab\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncia<\/span> mais recomendada a ser adicionada ao meio &eacute; o<\/p><p class=\"wp-block-paragraph\">a) sulfeto de s&oacute;dio.<br>b) cloreto de am&ocirc;nio.<br>c) di&oacute;xido de enxofre.<br>d) di&oacute;xido de carbono.<br>e) carbonato de c&aacute;lcio.<\/p><p class=\"wp-block-paragraph\">O texto aborda uma problem&aacute;tica ambiental: os impactos da minera&ccedil;&atilde;o para o meio ambiente. Segundo as informa&ccedil;&otilde;es qu&iacute;micas concedidas pelo enunciado, um dos resultados da minera&ccedil;&atilde;o &eacute; a libera&ccedil;&atilde;o de <span id=\"urn:enhancement-4662df0a-2c23-477b-9056-98207c3f8b0a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span> sulf&uacute;rico (H<sub>2<\/sub>SO<sub>4<\/sub>) em formato aquoso, que pode ser drenado no solo, por exemplo.&nbsp;<\/p><p class=\"wp-block-paragraph\">Em primeira inst&acirc;ncia, o composto que deve ser utilizado para solucionar essa quest&atilde;o precisa ser neutralizante das caracter&iacute;sticas &aacute;cidas. Nesse sentido, podemos pensar na fun&ccedil;&atilde;o inorg&acirc;nica diretamente oposta aos &aacute;cidos: as bases.&nbsp;<\/p><p class=\"wp-block-paragraph\">Nas alternativas apresentadas, temos alguns compostos &aacute;cidos ou derivados. A melhor afirmativa seria um sal que possua uma propriedade alcalina, isto &eacute;, derivado de uma base forte em rea&ccedil;&atilde;o com um <span id=\"urn:enhancement-8248fdab-6f20-4231-8086-39b6f62d4384\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span> fraco.&nbsp;<\/p><p class=\"wp-block-paragraph\">Observa-se, portanto, que a &uacute;nica op&ccedil;&atilde;o que se enquadra nessas circunst&acirc;ncias &eacute; a letra E.<\/p><h3 class=\"wp-block-heading\" id=\"h-questoes-ambientais-nos-vestibulares\">Quest&otilde;es ambientais nos vestibulares<\/h3><p class=\"wp-block-paragraph\">As quest&otilde;es ambientais, por muitas vezes, s&atilde;o temas das provas de vestibulares. Entre os assuntos mais tratados, sabemos que as <span id=\"urn:enhancement-3ec29579-892e-4835-9a30-17daf69bde4c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncias<\/span> qu&iacute;micas podem impactar diretamente o meio ambiente &mdash; inclusive os agrot&oacute;xicos. Veja a aula gratuita da Coruja sobre isso!<\/p><figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"cs-embed cs-embed-responsive\"><iframe title=\"Como a Qu&iacute;mica dos Agrot&oacute;xicos pode cair no vestibular - Prof. Gabriel Prazeres e Priscila Lima\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/CsaXZ1DOCEo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure><h2 class=\"wp-block-heading\" id=\"h-estude-mais-de-quimica-com-a-coruja\"><span class=\"ez-toc-section\" id=\"Estude-mais-de-quimica-com-a-Coruja\"><\/span>Estude mais de qu&iacute;mica com a Coruja!<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A banca de provas da sua faculdade dos sonhos tem testes com primeira e segunda fase? O <span id=\"urn:enhancement-ae065b56-b2e7-47b6-bb38-665983bafac9\" class=\"textannotation disambiguated wl-organization\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/estrategia_vestibulares\">Estrat&eacute;gia Vestibulares<\/span> pode te ajudar! Nossos simulados s&atilde;o constru&iacute;dos com base no seu modelo de prova, com gabarito e corre&ccedil;&atilde;o, inclusive para os exerc&iacute;cios discursivos da segunda fase. Clique no banner e saiba mais.<\/p><p class=\"wp-block-paragraph\"><a id=\"cta\" class=\"cta-imagem\" href=\"https:\/\/vestibulares.estrategia.com\/cursos\/\" target=\"blank\">\n                <img decoding=\"async\" width=\"100%\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/12\/EV4.jpg\" alt=\"CTA - Estrat\u00e9gia Vestibulares 4\" title=\"CTA - Estrat\u00e9gia Vestibulares 4\">\n        <\/a>\n\n\n\n<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Veja-tambem\"><\/span>Veja tamb&eacute;m:<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/quimica-geral\/\">Qu&iacute;mica geral: o que &eacute; e principais assuntos<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/dicas-para-aprender-quimica\/\">Dicas para aprender Qu&iacute;mica<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/estados-da-materia\/\">Estados da Mat&eacute;ria: o que s&atilde;o e como se transformam<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/tabela-periodica\/\">Tabela Peri&oacute;dica completa e atualizada: hist&oacute;rico, organiza&ccedil;&atilde;o, propriedades e mais!<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/gases-nobres\/\">Gases nobres: tire suas d&uacute;vidas!<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/equacao-de-clapeyron\/\">Equa&ccedil;&atilde;o de Clapeyron: o que &eacute; e como cai no vestibular?<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/equacao-de-nernst\/\">Equa&ccedil;&atilde;o de Nernst: o que &eacute; e como &eacute; cobrada em prova<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/destilacao-simples-e-fracionada\/\">Destila&ccedil;&atilde;o simples e fracionada: entenda a diferen&ccedil;a<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/funcoes-inorganicas\/\">Fun&ccedil;&otilde;es inorg&acirc;nicas: o que s&atilde;o &aacute;cidos, bases, sais e &oacute;xidos?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidez-e-basicidade-dos-compostos-organicos\/\">Acidez e basicidade dos compostos org&acirc;nicos: como reconhecer e diferenciar<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/reacoes-inorganicas\/\">Rea&ccedil;&otilde;es inorg&acirc;nicas: defini&ccedil;&atilde;o, tipos e quest&otilde;es de vestibular<\/a>&nbsp;<\/li>\n<\/ul><\/p>\n","protected":false},"excerpt":{"rendered":"Quando falamos no tema &ldquo;&aacute;cidos&rdquo;, &eacute; comum se lembrar de alimentos como lim&otilde;es, laranjas e abacaxis. Muito al&eacute;m&hellip;\n","protected":false},"author":23,"featured_media":73227,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-72561","post","type-post","status-publish","format-standard","has-post-thumbnail","category-quimica"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>\u00c1cidos: classifica\u00e7\u00f5es, nomenclatura e mais!<\/title>\n<meta name=\"description\" content=\"Conhe\u00e7a a defini\u00e7\u00e3o de \u00e1cidos, caracter\u00edsticas, classifica\u00e7\u00f5es, nomenclatura e muito mais para seus estudos pr\u00e9-vestibular com esse resumo!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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