{"id":205241,"date":"2025-03-24T09:02:34","date_gmt":"2025-03-24T09:02:34","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=205241"},"modified":"2025-03-24T09:02:36","modified_gmt":"2025-03-24T09:02:36","slug":"which-of-the-following-solutions-has-the-highest-ph","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/24\/which-of-the-following-solutions-has-the-highest-ph\/","title":{"rendered":"Which of the following solutions has the highest pH"},"content":{"rendered":"\n<p>Which of the following solutions has the highest pH: <\/p>\n\n\n\n<p>(a) 0.40 M HCOOH,<\/p>\n\n\n\n<p> (b) 0.40 M HClO4,<\/p>\n\n\n\n<p> (c) 0.40 M CH3COOH?<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/03\/image-1245.png\" alt=\"\" class=\"wp-image-205242\"\/><\/figure>\n\n\n\n<p>Among the given solutions\u2014(a) 0.40 M formic acid (HCOOH), (b) 0.40 M perchloric acid (HClO\u2084), and (c) 0.40 M acetic acid (CH\u2083COOH)\u2014the solution with the highest pH is (c) 0.40 M acetic acid.<\/p>\n\n\n\n<p>Perchloric acid (HClO\u2084) is a strong acid, meaning it completely dissociates in aqueous solution, releasing a high concentration of hydrogen ions (H\u207a), resulting in a low pH.<\/p>\n\n\n\n<p>Formic acid (HCOOH) and acetic acid (CH\u2083COOH) are both weak acids, which only partially dissociate in solution. The degree of dissociation is characterized by their acid dissociation constant (K\u2090) values:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Formic acid (HCOOH):<\/strong> K\u2090 = 1.8 \u00d7 10\u207b\u2074, pK\u2090 \u2248 3.7.<\/li>\n\n\n\n<li><strong>Acetic acid (CH\u2083COOH):<\/strong> K\u2090 = 1.8 \u00d7 10\u207b\u2075, pK\u2090 \u2248 4.8.<\/li>\n<\/ul>\n\n\n\n<p>A higher pK\u2090 value indicates a weaker acid. Since acetic acid has a higher pK\u2090 than formic acid, it is the weaker of the two acids. In equimolar solutions, the weaker acid dissociates less, producing fewer hydrogen ions and resulting in a higher pH.<\/p>\n\n\n\n<p>Therefore, among the three 0.40 M solutions, acetic acid has the highest pH, followed by formic acid, with perchloric acid having the lowest pH.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following solutions has the highest pH: (a) 0.40 M HCOOH, (b) 0.40 M HClO4, (c) 0.40 M CH3COOH? The correct answer and explanation is : Among the given solutions\u2014(a) 0.40 M formic acid (HCOOH), (b) 0.40 M perchloric acid (HClO\u2084), and (c) 0.40 M acetic acid (CH\u2083COOH)\u2014the solution with the highest pH [&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-205241","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/205241","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=205241"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/205241\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=205241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=205241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=205241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}