{"id":53958,"date":"2021-08-25T17:00:00","date_gmt":"2021-08-25T20:00:00","guid":{"rendered":"https:\/\/blog.estrategiavestibulares.com.br\/?p=53958"},"modified":"2024-02-20T15:34:39","modified_gmt":"2024-02-20T18:34:39","slug":"o-que-cai-sobre-equilibrio-quimico-no-enem","status":"publish","type":"post","link":"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/o-que-cai-sobre-equilibrio-quimico-no-enem\/","title":{"rendered":"O que cai sobre Equil\u00edbrio Qu\u00edmico no Enem?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A prova de ci&ecirc;ncias da natureza do Enem pode ser desafiadora para muitas pessoas. Para amenizar esse sentimento, &eacute; importante fundamentar seu conhecimento sobre <span id=\"urn:enhancement-f540a418-eb05-42b5-9e24-6b529964feb0\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/quimica\">qu&iacute;mica<\/span>, <span id=\"urn:enhancement-252a54e6-4867-44b4-bf5a-302ad2f25ca0\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/biologia\">biologia<\/span> e f&iacute;sica. Temas como <span id=\"urn:enhancement-8e23a9c4-c8bb-4186-b9fe-62fd06a569de\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> qu&iacute;mico, <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/estequiometria-enem\/\" target=\"_blank\">estequiometria<\/a>, <span id=\"urn:enhancement-8fa2da31-34c5-4226-8a29-40909bfdbe17\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/dinamica\">din&acirc;mica<\/span> e <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/biologia\/ecologia-prova-de-vestibular\/\" target=\"_blank\">ecologia <\/a>s&atilde;o essenciais para sua prepara&ccedil;&atilde;o!<p class=\"wp-block-paragraph\">Para te ajudar, o Estrat&eacute;gia Vestibulares preparou um artigo com as principais informa&ccedil;&otilde;es sobre <span id=\"urn:enhancement-a59c96bf-c746-4a0b-8617-5e6f0e60244c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> qu&iacute;mico como seus gr&aacute;ficos,&nbsp; princ&iacute;pios, c&aacute;lculos do potencial hidrogeni&ocirc;nico, suas constantes e outros t&oacute;picos. Acompanhe a seguir!<\/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\/o-que-cai-sobre-equilibrio-quimico-no-enem\/#O-que-e-Equilibrio-Quimico\" >O que &eacute; Equil&iacute;brio Qu&iacute;mico?<\/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\/o-que-cai-sobre-equilibrio-quimico-no-enem\/#Principais-temas-sobre-Equilibrio-Quimico-no-Enem\" >Principais temas sobre Equil&iacute;brio Qu&iacute;mico no Enem<\/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\/o-que-cai-sobre-equilibrio-quimico-no-enem\/#Mapa-mental-sobre-Equilibrio-Quimico-para-o-Enem\" >Mapa mental sobre Equil&iacute;brio Qu&iacute;mico para o Enem<\/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\/o-que-cai-sobre-equilibrio-quimico-no-enem\/#Equilibrio-Quimico-Enem-questoes\" >Equil&iacute;brio Qu&iacute;mico Enem quest&otilde;es<\/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\/o-que-cai-sobre-equilibrio-quimico-no-enem\/#Veja-tambem\" >Veja tamb&eacute;m:<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-o-que-e-equilibrio-quimico\"><span class=\"ez-toc-section\" id=\"O-que-e-Equilibrio-Quimico\"><\/span>O que &eacute; Equil&iacute;brio Qu&iacute;mico?<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\"><span id=\"urn:enhancement-17748866-90fe-4a1d-a220-a23697f33c5c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">Equil&iacute;brio<\/span> qu&iacute;mico &eacute; o conceito usado para rea&ccedil;&otilde;es qu&iacute;micas revers&iacute;veis, ou seja, que podem acontecer em sentido direto (&rarr;) ou indireto (&larr;). Ele &eacute; importante para determinar a velocidade de forma&ccedil;&atilde;o de uma <span id=\"urn:enhancement-cb744baa-03a1-48c1-b11c-4b50382d1c42\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncia<\/span> conforme as condi&ccedil;&otilde;es de temperatura, press&atilde;o e concentra&ccedil;&atilde;o na solu&ccedil;&atilde;o.<\/p><p class=\"wp-block-paragraph\">Diz-se que uma rea&ccedil;&atilde;o est&aacute; equilibrada quando <strong>as concentra&ccedil;&otilde;es de <span id=\"urn:enhancement-b640c9eb-7963-44f7-942b-76097a2edece\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagentes<\/span> e produtos s&atilde;o constantes<\/strong> e, quando <strong>as velocidades do sentido direto e indireto se igualam.&nbsp;<\/strong><\/p><p class=\"wp-block-paragraph\">Existe uma <strong>constante de <span id=\"urn:enhancement-6d5fd91e-087e-4da1-be37-6417c2850370\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> K<\/strong><strong><sub>eq<\/sub><\/strong>, que utiliza n&uacute;meros para determinar o sentido das rea&ccedil;&otilde;es e auxiliar na compreens&atilde;o das intera&ccedil;&otilde;es qu&iacute;micas.<\/p><p class=\"wp-block-paragraph\">O valor de K<sub>eq <\/sub>&nbsp;&eacute; calculado com base na concentra&ccedil;&atilde;o de produtos e <span id=\"urn:enhancement-184bb653-16a1-42fd-ae6a-f148b4e63fb5\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagentes<\/span> no momento em que a rea&ccedil;&atilde;o atinge o <span id=\"urn:enhancement-f32939fe-c4c6-4b11-b0f2-c0c94903ad46\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span>. Considere a rea&ccedil;&atilde;o gen&eacute;rica:<\/p><p class=\"has-text-align-center wp-block-paragraph\"><strong>A + B &#8651; C + D<\/strong><\/p><p class=\"wp-block-paragraph\">Para calcular K<sub>eq<\/sub>, utiliza-se a f&oacute;rmula: <strong>K<\/strong><strong><sub>eq<\/sub><\/strong><strong>=[produtos]\/[reagentes]<\/strong>, ou seja: K<sub>eq<\/sub>=[C].[D]\/[A].[B]\n\n\n\n<\/p><h2 class=\"wp-block-heading\" id=\"h-principais-temas-sobre-equilibrio-quimico-no-enem\"><span class=\"ez-toc-section\" id=\"Principais-temas-sobre-Equilibrio-Quimico-no-Enem\"><\/span>Principais temas sobre Equil&iacute;brio Qu&iacute;mico no Enem<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Agora que voc&ecirc; j&aacute; conhece a defini&ccedil;&atilde;o de <span id=\"urn:enhancement-c1eac9da-1bb7-4fae-b52b-b03c1ee59836\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> qu&iacute;mico, aprenda mais sobre os principais temas sobre <span id=\"urn:enhancement-44b4c86c-af08-4a29-950e-b62c3b4624b1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> qu&iacute;mico no Enem!<\/p><h3 class=\"wp-block-heading\" id=\"h-graficos-do-equilibrio-quimico\">Gr&aacute;ficos do Equil&iacute;brio Qu&iacute;mico<\/h3><p class=\"wp-block-paragraph\">Conforme visto anteriormente, no <span id=\"urn:enhancement-fc8fcbc3-a649-4c26-a6fc-4ccec5672530\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> qu&iacute;mico, as concentra&ccedil;&otilde;es de <span id=\"urn:enhancement-369bd968-daa9-47c8-adb1-b70095424f37\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagentes<\/span> e produtos ficam constantes. Para representar esse fato graficamente, &eacute; preciso considerar que <strong>os <span id=\"urn:enhancement-f51a2f51-53fb-42a8-8698-5b7fd82c0c32\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagentes<\/span> s&atilde;o consumidos (diminui a concentra&ccedil;&atilde;o) e os produtos s&atilde;o formados (aumento da concentra&ccedil;&atilde;o)<\/strong>. Veja:<\/p><figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"618\" height=\"435\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-11.png\" alt=\"\" class=\"wp-image-53966\" srcset=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-11.png 618w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-11-300x211.png 300w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-11-200x140.png 200w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-11-380x267.png 380w\" sizes=\"(max-width: 618px) 100vw, 618px\" \/><\/figure><figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"633\" height=\"463\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-12.png\" alt=\"\" class=\"wp-image-53967\" srcset=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-12.png 633w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-12-300x219.png 300w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-12-380x278.png 380w\" sizes=\"(max-width: 633px) 100vw, 633px\" \/><\/figure><p class=\"wp-block-paragraph\">Perceba que alcan&ccedil;ar o <span id=\"urn:enhancement-411367ce-802f-4892-8d61-85a90bd3c548\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> n&atilde;o se relaciona com os produtos apresentarem maior concentra&ccedil;&atilde;o que os <span id=\"urn:enhancement-9e86a675-c56c-4c84-94ec-4848e13f17c1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagentes<\/span>, apenas que as concentra&ccedil;&otilde;es devem ser constantes. Graficamente, isso significa que as linhas de concentra&ccedil;&atilde;o estar&atilde;o paralelas.<\/p><p class=\"wp-block-paragraph\">Al&eacute;m disso, o <span id=\"urn:enhancement-9e9c9de3-8dca-48e3-9f05-b7123f70271b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> qu&iacute;mico requer velocidades iguais para os dois sentidos da rea&ccedil;&atilde;o. Nas figuras abaixo, isso ser&aacute; representado por meio de gr&aacute;ficos:<\/p><figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"617\" height=\"465\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-13.png\" alt=\"\" class=\"wp-image-53968\" srcset=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-13.png 617w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-13-300x225.png 300w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-13-380x286.png 380w\" sizes=\"(max-width: 617px) 100vw, 617px\" \/><\/figure><h3 class=\"wp-block-heading\" id=\"h-principio-de-le-chatelier\"><br>Princ&iacute;pio de Le Chatelier<\/h3><p class=\"wp-block-paragraph\">O princ&iacute;pio de Le Chatelier diz que &ldquo;<strong>quando uma a&ccedil;&atilde;o externa atua sobre uma rea&ccedil;&atilde;o em <span id=\"urn:enhancement-e3565107-eccf-485f-a4ab-54db2e115f42\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span>, ele [o equil&iacute;brio] ser&aacute; deslocado com o objetivo de minimizar o efeito<\/strong>&rdquo;. Em termos pr&aacute;ticos, isso significa que a rea&ccedil;&atilde;o equilibrada busca manter seu <span id=\"urn:enhancement-8d1a5640-f112-4407-addb-28a0d9db5088\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> &mdash; altera&ccedil;&otilde;es na concentra&ccedil;&atilde;o, press&atilde;o e temperatura s&atilde;o os aspectos mais consider&aacute;veis.<\/p><h3 class=\"wp-block-heading\" id=\"h-ph\">pH<\/h3><p class=\"wp-block-paragraph\">A sigla pH indica o potencial hidrogeni&ocirc;nico, que &eacute; um valor num&eacute;rico que dimensiona a <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/acidez-e-basicidade-dos-compostos-organicos\/\" target=\"_blank\">acidez ou basicidade<\/a>&nbsp;de uma <span id=\"urn:enhancement-a010d1b1-dedf-4f62-ae71-ccb4bd22e6b6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncia<\/span> <span id=\"urn:enhancement-276a5bb8-46c9-4d3b-a0a8-2ad2261b1c51\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/quimica\">qu&iacute;mica<\/span>. Para isso, o ph representa a <strong>quantidade de &iacute;ons H<sup>+<\/sup><\/strong> presentes na solu&ccedil;&atilde;o.&nbsp;<\/p><p class=\"wp-block-paragraph\">Para calcular o valor do pH, deve-se utilizar a f&oacute;rmula <strong>pH=log [H<sub>3<\/sub>O<sup>+<\/sup>].&nbsp;<\/strong>Com o resultado em m&atilde;os, &eacute; importante saber que:&nbsp;<\/p><ul class=\"wp-block-list\">\n<li>solu&ccedil;&otilde;es de<strong> pH menor que 7 s&atilde;o &aacute;cidas<\/strong>;<\/li>\n\n\n\n<li>solu&ccedil;&otilde;es de<strong> pH maior que 7 s&atilde;o alcalinas<\/strong> (ou b&aacute;sicas); e<\/li>\n\n\n\n<li><strong>solu&ccedil;&otilde;es neutras t&ecirc;m pH igual a 7.<\/strong><\/li>\n<\/ul><p class=\"wp-block-paragraph\">Al&eacute;m disso, &eacute; determinado pela <span id=\"urn:enhancement-ea83c724-94b1-4455-8efb-a7caf14c2af9\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/quimica\">qu&iacute;mica<\/span>, que a rea&ccedil;&atilde;o entre componentes de pH <span id=\"urn:enhancement-c7107319-30a2-4f17-9c76-0de4463cb975\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span> e compostos de pH alcalino gera a neutraliza&ccedil;&atilde;o de ambos os materiais. Veja uma esquematiza&ccedil;&atilde;o da rea&ccedil;&atilde;o de neutraliza&ccedil;&atilde;o:<\/p><p class=\"has-text-align-center wp-block-paragraph\"><strong><span id=\"urn:enhancement-8003deae-19d0-4ba3-a9dd-b0c403af93e2\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&Aacute;cido<\/span> + Base -&gt; &Aacute;gua + Sal&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/strong><\/p><h3 class=\"wp-block-heading\" id=\"h-deslocamento-de-equilibrio\"><br>Deslocamento de equil&iacute;brio<\/h3><p class=\"wp-block-paragraph\">Conforme o princ&iacute;pio de Le Chatelier, s&atilde;o propostas algumas leis sobre o deslocamento de <span id=\"urn:enhancement-d406ce47-31c4-4311-a546-6ecaba4011e6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span>, veja na lista abaixo:<\/p><ul class=\"wp-block-list\">\n<li><strong>Concentra&ccedil;&atilde;o: <\/strong>aumentar a concentra&ccedil;&atilde;o de uma subst&acirc;ncia, desloca o equil&iacute;brio para o gasto dela. J&aacute; diminuir a concentra&ccedil;&atilde;o da subst&acirc;ncia, desloca o equil&iacute;brio para repor o que foi retirado;<\/li>\n\n\n\n<li><strong>Temperatura: <\/strong>o aumento da temperatura favorece o sentido endot&eacute;rmico da rea&ccedil;&atilde;o, enquanto as temperaturas abaixadas deslocam o equil&iacute;brio para o sentido exot&eacute;rmico; e&nbsp;<\/li>\n\n\n\n<li><strong>Press&atilde;o: <\/strong>a press&atilde;o elevada desloca o equil&iacute;brio para o lado com menor soma dos mols, a press&atilde;o rebaixada inclina o equil&iacute;brio para o lado com maior soma total do n&uacute;mero de mols.<\/li>\n<\/ul><h3 class=\"wp-block-heading\" id=\"h-constante-de-ionizacao\"><br>Constante de ioniza&ccedil;&atilde;o<\/h3><p class=\"wp-block-paragraph\">A constante de ioniza&ccedil;&atilde;o, ou K<sub>i<\/sub>, &eacute; uma forma de <strong>expressar a constante de <span id=\"urn:enhancement-5ef5deaf-2bd8-4a1d-ace2-588c01ae863c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equilibrios-quimicos\">equil&iacute;brio<\/span> em solu&ccedil;&otilde;es i&ocirc;nicas.&nbsp;<\/strong><br>Geralmente, quanto maior o K<sub>i<\/sub>, mais forte ser&aacute; o <span id=\"urn:enhancement-3c913080-a85f-4138-a304-089fe811a711\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span> e a base. Para obter o valor, deve ser ponderado se a mistura &eacute; &aacute;cida ou alcalina e, depois, efetuar os c&aacute;lculos:<\/p><ul class=\"wp-block-list\">\n<li><strong>&Aacute;cidos: <\/strong>HA &#8651; H<sup>+ <\/sup>+ A<sup>&ndash;<\/sup>&nbsp; &nbsp; &nbsp; <strong>K<\/strong><strong><sub>i<\/sub><\/strong><strong>= [H<\/strong><strong><sup>+<\/sup><\/strong><strong>].[ A<\/strong><strong><sup>&ndash;<\/sup><\/strong><strong>]\/[HA]; e<\/strong><\/li>\n\n\n\n<li><strong>Bases: <\/strong>BOH &#8651; B<sup>+ <\/sup>+ OH<sup>&ndash;<\/sup>&nbsp; &nbsp; &nbsp; <strong>K<\/strong><strong><sub>i<\/sub><\/strong><strong>= [B<\/strong><strong><sup>+<\/sup><\/strong><strong>].[ OH<\/strong><strong><sup>&ndash;<\/sup><\/strong><strong>]\/[BOH].<\/strong><\/li>\n<\/ul><h3 class=\"wp-block-heading\" id=\"h-hidrolise-salina\">Hidr&oacute;lise salina<\/h3><p class=\"wp-block-paragraph\">A <strong><span id=\"urn:enhancement-a2317925-d876-417f-8e7f-e49a2868f30c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidrolise\">hidr&oacute;lise<\/span> salina<\/strong> &eacute; um importante t&oacute;pico de assunto para o Enem. Em termos gerais, ela trata sobre a <strong>rea&ccedil;&atilde;o entre um sal e a <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/caracteristicas-da-agua\/\" target=\"_blank\">&aacute;gua<\/a><\/strong>, de forma que <strong>produza um <span id=\"urn:enhancement-43ac30d6-ca87-4737-91ad-1569ca82f850\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/acido\">&aacute;cido<\/span> e uma base.&nbsp;<\/strong><br>Uma rea&ccedil;&atilde;o gen&eacute;rica que representa esse tema &eacute;<strong> A<sup>+<\/sup>B<sup>&ndash;<\/sup> + H<sup>+<\/sup>&ndash;<span id=\"urn:enhancement-d3a4774f-9056-4d03-8b17-4a8f80058703\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidroxila\">OH<\/span><sup>&ndash;<\/sup> &#8651; HB<sup> <\/sup>+ AOH<\/strong>.&nbsp;<\/p><p class=\"wp-block-paragraph\">Note que essa rea&ccedil;&atilde;o pode apresentar pHs diferentes, dado que pode gerar &aacute;cidos e bases fortes ou fracos.<\/p><h2 class=\"wp-block-heading\" id=\"h-mapa-mental-sobre-equilibrio-quimico-para-o-enem\"><span class=\"ez-toc-section\" id=\"Mapa-mental-sobre-Equilibrio-Quimico-para-o-Enem\"><\/span>Mapa mental sobre Equil&iacute;brio Qu&iacute;mico para o Enem<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">O mapa mental abaixo, desenvolvido pelo Estrat&eacute;gia Vestibulares, re&uacute;ne os t&oacute;picos desse texto de forma l&uacute;dica e did&aacute;tica, confira:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/1fhbhE_Z-lYbXnXf1t-ufKYSaDPJrx3clhrJusutan67SFO5h2fa33HVEkTIzl-puORz_tYdVGcZ0p1DDq0FGulkkvVf7jOkupR8Dx7e4CvVJw8FIttRIMetccnLPAA-KAVHJZT4=s0\" alt=\"Mapa mental sobre Equil&iacute;brio Qu&iacute;mico para o Enem\"><\/figure>\n<\/div><h2 class=\"wp-block-heading\" id=\"h-equilibrio-quimico-enem-questoes\"><span class=\"ez-toc-section\" id=\"Equilibrio-Quimico-Enem-questoes\"><\/span><br>Equil&iacute;brio Qu&iacute;mico Enem quest&otilde;es<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\"><strong>ENEM 2012<\/strong><\/p><p class=\"wp-block-paragraph\">Uma dona de casa acidentalmente deixou cair na geladeira a &aacute;gua proveniente do degelo de um peixe, o que deixou um cheiro forte e desagrad&aacute;vel dentro do eletrodom&eacute;stico. Sabe-se que o odor caracter&iacute;stico de peixe se deve &agrave;s <span id=\"urn:enhancement-062ec61f-80d0-498f-834d-9e38844802ac\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/aminas\">aminas<\/span> e que esses compostos se comportam como bases.<\/p><p class=\"wp-block-paragraph\">Na tabela s&atilde;o listadas as concentra&ccedil;&otilde;es hidrogeni&ocirc;nicas de alguns materiais encontrados na cozinha, que a dona de casa pensa em utilizar na limpeza da geladeira.&nbsp;<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Material<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Concentra&ccedil;&atilde;o de H<\/strong><strong><sub>3<\/sub><\/strong><strong>O<\/strong><strong><sup>+ <\/sup><\/strong><strong>(<span id=\"urn:enhancement-1d82f271-194a-4c74-84c2-291fab3cea46\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mol\">mol<\/span>\/L)<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Suco de Lim&atilde;o<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-2<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Leite<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-6<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Vinagre<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-3<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><span id=\"urn:enhancement-3bee916e-874f-4eb1-bbb2-dc4e4323b953\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/alcool\">&Aacute;lcool<\/span>&nbsp;<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-8<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Sab&atilde;o<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-12<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Carbonato de S&oacute;dio\/Barrilha<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-12<\/sup><\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\">Dentre os materiais listados, quais s&atilde;o apropriados para amenizar esse odor?&nbsp;<\/p><p class=\"wp-block-paragraph\">a) <span id=\"urn:enhancement-48df11f6-da27-4821-a4d9-3c2b3e6136ee\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/alcool\">&Aacute;lcool<\/span> ou sab&atilde;o.<br>b) Suco de lim&atilde;o ou <span id=\"urn:enhancement-8abc7247-2a0c-4c42-be7a-a3a3903bde96\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/alcool\">&aacute;lcool<\/span>.<br>c) Suco de lim&atilde;o ou vinagre.<br>d) Suco de lim&atilde;o, leite ou sab&atilde;o.<br>e) Sab&atilde;o ou carbonato de s&oacute;dio\/barrilha.<\/p><p class=\"wp-block-paragraph\">O enunciado cita que &ldquo;o odor caracter&iacute;stico de peixe se deve &agrave;s <span id=\"urn:enhancement-14422382-d10a-4f90-83f4-b2143d2a9f77\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/aminas\">aminas<\/span> e que esses compostos <strong>se comportam como bases<\/strong>&rdquo;. Com isso, deve-se lembrar que a <strong>neutraliza&ccedil;&atilde;o <span id=\"urn:enhancement-309697ad-9e20-468e-a262-0f0d90ee0a0b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/quimica\">qu&iacute;mica<\/span><\/strong> de um composto alcalino requer uma <span id=\"urn:enhancement-3b714ec5-7feb-4383-a6c3-be0c2de4b018\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/substancia\">subst&acirc;ncia<\/span> &aacute;cida.<br>Dessa forma, todos os compostos de ph&lt;7 devem ser considerados. Como <strong>pH=log [H<sub>3<\/sub>O<sup>+<\/sup>], <\/strong>observa-se que: <\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"556\" height=\"224\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-14.png\" alt=\"Equil&iacute;brio Qu&iacute;mico Enem\" class=\"wp-image-53969\" srcset=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-14.png 556w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-14-300x121.png 300w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/08\/image-14-380x153.png 380w\" sizes=\"(max-width: 556px) 100vw, 556px\" \/><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Conforme as alternativas poss&iacute;veis, assume-se que a &uacute;nica op&ccedil;&atilde;o vi&aacute;vel &eacute; a <strong>letra C.<\/strong><\/p><h3 class=\"wp-block-heading\" id=\"h-conheca-o-conteudo-exclusivo-do-estrategia\">Conhe&ccedil;a o conte&uacute;do exclusivo do Estrat&eacute;gia!<\/h3><p class=\"wp-block-paragraph\">Vai prestar vestibulares e a <span id=\"urn:enhancement-1024b2e4-fc87-49fb-89d9-9efe9231990c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/quimica\">qu&iacute;mica<\/span> te assusta? Seja um aluno do Estrat&eacute;gia Vestibulares! Na nossa plataforma voc&ecirc; ter&aacute; acesso a aulas e materiais elaborados para melhorar seu desempenho!<\/p><p class=\"wp-block-paragraph\">Clique no banner abaixo:<\/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-organica-enem\/\">O que mais cai em Qu&iacute;mica Org&acirc;nica no Enem?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/separacao-de-misturas-enem\/\">Como &eacute; cobrada a Separa&ccedil;&atilde;o de Misturas no Enem?<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/solucoes-quimicas-no-enem\/\" target=\"_blank\">O que cai de Solu&ccedil;&otilde;es Qu&iacute;micas no Enem?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/eletroquimica-no-enem\/\">Eletroqu&iacute;mica no Enem: o que cai?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/classificacoes-de-quimica-organica-para-enem\/\">Classifica&ccedil;&otilde;es de Qu&iacute;mica Org&acirc;nica para o Enem<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/solucoes-quimicas-no-enem\/\">O que cai de Solu&ccedil;&otilde;es Qu&iacute;micas no Enem?<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/cinetica-quimica\/\">Cin&eacute;tica qu&iacute;mica: defini&ccedil;&atilde;o, f&oacute;rmulas e aplica&ccedil;&otilde;es<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/estequiometria-enem\/\">Estequiometria no Enem: como aparece?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/quimica\/calculo-estequiometrico\/\">C&aacute;lculo Estequiom&eacute;trico: o que &eacute; e como calcular!<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/massa-molar\/\">Massa molar: o que &eacute;, n&uacute;mero de mol, como calcular e quest&otilde;es<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/concentracao-molar\/\">Concentra&ccedil;&atilde;o molar: o que &eacute;, como calcular e aplica&ccedil;&otilde;es<\/a><\/li>\n<\/ul><\/p>\n","protected":false},"excerpt":{"rendered":"A prova de ci&ecirc;ncias da natureza do Enem pode ser desafiadora para muitas pessoas. Para amenizar esse sentimento,&hellip;\n","protected":false},"author":23,"featured_media":53970,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-53958","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>O que cai sobre Equil\u00edbrio Qu\u00edmico no Enem?<\/title>\n<meta name=\"description\" content=\"Entenda os conceitos qu\u00edmicos que permeiam as solu\u00e7\u00f5es qu\u00edmicas em equil\u00edbrio. 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