{"id":234839,"date":"2025-06-14T13:45:17","date_gmt":"2025-06-14T13:45:17","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=234839"},"modified":"2025-06-14T13:45:19","modified_gmt":"2025-06-14T13:45:19","slug":"the-correct-formula-for-the-hydrogen-phosphate-anion-is-hpo42","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/14\/the-correct-formula-for-the-hydrogen-phosphate-anion-is-hpo42\/","title":{"rendered":"The correct formula for the hydrogen phosphate anion is HPO4^2-."},"content":{"rendered":"\n

The correct formula for the hydrogen phosphate anion is HPO4^2-.<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer:<\/strong> The correct formula for the hydrogen phosphate anion is HPO\u2084\u00b2\u207b<\/strong>.<\/p>\n\n\n\n

Explanation:<\/strong><\/p>\n\n\n\n

Hydrogen phosphate is a polyatomic ion that belongs to the phosphate family. This ion forms when one hydrogen ion (H\u207a) combines with the phosphate ion (PO\u2084\u00b3\u207b). Phosphate (PO\u2084\u00b3\u207b) is a tetrahedral anion consisting of one phosphorus atom centrally bonded to four oxygen atoms. By introducing one hydrogen ion (H\u207a) to the phosphate structure, the resulting species becomes hydrogen phosphate (HPO\u2084\u00b2\u207b), carrying a net charge of negative two.<\/p>\n\n\n\n

In this ion, the hydrogen attaches to one of the oxygen atoms, typically forming a P\u2013O\u2013H bond. The other oxygen atoms carry negative charges to balance the overall -2 charge. This ion is part of a series of conjugate bases formed by successive deprotonation of phosphoric acid (H\u2083PO\u2084). The progression occurs in three steps:<\/p>\n\n\n\n

    \n
  1. H\u2083PO\u2084 (phosphoric acid) loses one hydrogen ion to form H\u2082PO\u2084\u207b (dihydrogen phosphate).<\/li>\n\n\n\n
  2. H\u2082PO\u2084\u207b loses another hydrogen ion to form HPO\u2084\u00b2\u207b (hydrogen phosphate).<\/li>\n\n\n\n
  3. HPO\u2084\u00b2\u207b can lose the last hydrogen ion to become PO\u2084\u00b3\u207b (phosphate).<\/li>\n<\/ol>\n\n\n\n

    This series illustrates how hydrogen phosphate occupies the intermediate stage between dihydrogen phosphate and phosphate. In aqueous solution, hydrogen phosphate acts as a weak base and can accept a proton to form dihydrogen phosphate again or lose a proton to become phosphate.<\/p>\n\n\n\n

    Hydrogen phosphate is important in biological systems, especially in buffering systems that maintain pH in blood and cells. Its formula, HPO\u2084\u00b2\u207b, accurately reflects the presence of one hydrogen atom, one phosphorus atom, and four oxygen atoms, with an overall charge of -2 resulting from the loss of two protons from phosphoric acid. This specific formula must be used to distinguish it from related ions like dihydrogen phosphate (H\u2082PO\u2084\u207b) and phosphate (PO\u2084\u00b3\u207b).<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    The correct formula for the hydrogen phosphate anion is HPO4^2-. The Correct Answer and Explanation is: Correct Answer: The correct formula for the hydrogen phosphate anion is HPO\u2084\u00b2\u207b. Explanation: Hydrogen phosphate is a polyatomic ion that belongs to the phosphate family. This ion forms when one hydrogen ion (H\u207a) combines with the phosphate ion (PO\u2084\u00b3\u207b). […]<\/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-234839","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234839","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=234839"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234839\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=234839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=234839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=234839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}