{"id":218883,"date":"2025-05-24T15:35:22","date_gmt":"2025-05-24T15:35:22","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=218883"},"modified":"2025-05-24T15:35:24","modified_gmt":"2025-05-24T15:35:24","slug":"which-of-the-following-acids-has-the-weakest-conjugate-base-in-aqueous-solution","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/24\/which-of-the-following-acids-has-the-weakest-conjugate-base-in-aqueous-solution\/","title":{"rendered":"Which of the following acids has the weakest conjugate base in aqueous solution"},"content":{"rendered":"\n<p>Which of the following acids has the weakest conjugate base in aqueous solution?<\/p>\n\n\n\n<p>A.CH3COOH<\/p>\n\n\n\n<p>B.HF<\/p>\n\n\n\n<p>C.HOCl<\/p>\n\n\n\n<p>D.HNO2<\/p>\n\n\n\n<p>E.Hcl<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct answer is: <strong>E. HCl<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation <\/h3>\n\n\n\n<p>To determine which acid has the <strong>weakest conjugate base<\/strong>, we must first understand the relationship between acid strength and conjugate base strength.<\/p>\n\n\n\n<p>According to Br\u00f8nsted-Lowry theory:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A strong acid<\/strong> donates protons easily and dissociates completely in water.<\/li>\n\n\n\n<li>Its <strong>conjugate base<\/strong> has little tendency to accept a proton, making it very weak.<\/li>\n\n\n\n<li><strong>A weak acid<\/strong>, in contrast, only partially dissociates in water, and its conjugate base is relatively stronger.<\/li>\n<\/ul>\n\n\n\n<p>Thus, the <strong>stronger the acid<\/strong>, the <strong>weaker its conjugate base<\/strong>.<\/p>\n\n\n\n<p>Now let\u2019s examine each option:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A. CH\u2083COOH (acetic acid)<\/strong>: A weak organic acid. Its conjugate base, CH\u2083COO\u207b, is moderately strong.<\/li>\n\n\n\n<li><strong>B. HF (hydrofluoric acid)<\/strong>: Though it contains a halogen, HF is not a strong acid due to strong hydrogen bonding. Its conjugate base F\u207b is relatively stronger.<\/li>\n\n\n\n<li><strong>C. HOCl (hypochlorous acid)<\/strong>: A weak acid. Its conjugate base OCl\u207b is relatively stronger.<\/li>\n\n\n\n<li><strong>D. HNO\u2082 (nitrous acid)<\/strong>: Also a weak acid. The conjugate base NO\u2082\u207b is stronger than that of a strong acid.<\/li>\n\n\n\n<li><strong>E. HCl (hydrochloric acid)<\/strong>: A <strong>strong acid<\/strong> that dissociates completely in water:<br>HCl \u2192 H\u207a + Cl\u207b<br>Its conjugate base Cl\u207b is extremely weak because it has negligible tendency to re-accept a proton.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion:<\/h3>\n\n\n\n<p>Among the listed acids, <strong>HCl<\/strong> is the strongest. Therefore, its conjugate base (Cl\u207b) is the <strong>weakest<\/strong>. This makes <strong>option E<\/strong> the correct answer. This question tests understanding of acid-base equilibrium and the inverse relationship between acid strength and conjugate base strength \u2014 a core concept in general and analytical chemistry.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/05\/image-374.png\" alt=\"\" class=\"wp-image-218884\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following acids has the weakest conjugate base in aqueous solution? A.CH3COOH B.HF C.HOCl D.HNO2 E.Hcl The Correct Answer and Explanation is: The correct answer is: E. HCl Explanation To determine which acid has the weakest conjugate base, we must first understand the relationship between acid strength and conjugate base strength. According to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-218883","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218883","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=218883"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218883\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=218883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=218883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=218883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}