Citric Acid (H3C6H5O7) Is A Polyprotic Acid. When Citric Acid Dissolves In Water, Which Is Higher, The Concentration Of H2C6H5O7\u2212Ions Or The Concentration Of HC6H5O72\u2212 Ions?<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n The correct answer is: The concentration of H\u2082C\u2086H\u2085O\u2087\u207b ions<\/strong> is higher than the concentration of HC\u2086H\u2085O\u2087\u00b2\u207b ions<\/strong>.<\/p>\n\n\n\n Citric acid (C\u2086H\u2088O\u2087), with the chemical formula H\u2083C\u2086H\u2085O\u2087, is a polyprotic acid<\/strong>, meaning it can donate more than one proton (H\u207a) per molecule. Specifically, citric acid has three carboxyl groups (-COOH), each capable of losing a proton. The dissociation process occurs in multiple steps:<\/p>\n\n\n\n In summary, the dissociation of citric acid predominantly favors the first dissociation step, which produces H\u2082C\u2086H\u2085O\u2087\u207b<\/strong> ions. Since the second and third dissociations occur to a lesser extent, the concentration of H\u2082C\u2086H\u2085O\u2087\u207b ions<\/strong> is higher than that of HC\u2086H\u2085O\u2087\u00b2\u207b ions<\/strong> in solution.<\/p>\n","protected":false},"excerpt":{"rendered":" Citric Acid (H3C6H5O7) Is A Polyprotic Acid. When Citric Acid Dissolves In Water, Which Is Higher, The Concentration Of H2C6H5O7\u2212Ions Or The Concentration Of HC6H5O72\u2212 Ions? The Correct Answer and Explanation is: The correct answer is: The concentration of H\u2082C\u2086H\u2085O\u2087\u207b ions is higher than the concentration of HC\u2086H\u2085O\u2087\u00b2\u207b ions. Explanation: Citric acid (C\u2086H\u2088O\u2087), with the […]<\/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-168211","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168211","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=168211"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168211\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=168211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=168211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=168211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
\n
The first proton is donated from the carboxyl group, resulting in the formation of H\u2082C\u2086H\u2085O\u2087\u207b (the citrate ion)<\/strong>:
[
\\text{H\u2083C\u2086H\u2085O\u2087} \\rightleftharpoons \\text{H\u2082C\u2086H\u2085O\u2087}\u207b + \\text{H}\u207a
]
This step has a relatively high dissociation constant (K\u2081), meaning it is the most likely step to occur when citric acid dissolves in water. As a result, a significant concentration of H\u2082C\u2086H\u2085O\u2087\u207b ions is present in solution.<\/li>\n\n\n\n
The second proton is donated from the H\u2082C\u2086H\u2085O\u2087\u207b ion, forming the HC\u2086H\u2085O\u2087\u00b2\u207b ion<\/strong>:
[
\\text{H\u2082C\u2086H\u2085O\u2087}\u207b \\rightleftharpoons \\text{HC\u2086H\u2085O\u2087}\u00b2\u207b + \\text{H}\u207a
]
This step has a lower dissociation constant (K\u2082) compared to the first dissociation, indicating that it is less likely to occur. Therefore, fewer HC\u2086H\u2085O\u2087\u00b2\u207b ions will be present in solution.<\/li>\n\n\n\n
The third proton dissociates from HC\u2086H\u2085O\u2087\u00b2\u207b to form C\u2086H\u2085O\u2087\u00b3\u207b<\/strong>, but this step has an even lower dissociation constant (K\u2083), meaning it occurs to an even lesser extent.<\/li>\n<\/ol>\n\n\n\n