{"id":208405,"date":"2025-04-26T16:24:54","date_gmt":"2025-04-26T16:24:54","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=208405"},"modified":"2025-04-26T16:24:54","modified_gmt":"2025-04-26T16:24:54","slug":"hi-is-an-arrhenius-acid-because","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/26\/hi-is-an-arrhenius-acid-because\/","title":{"rendered":"\u00a0HI is an Arrhenius acid because"},"content":{"rendered":"\n<p>&nbsp;HI is an Arrhenius acid because<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A) it is a polar molecule.<\/li>\n\n\n\n<li>B) it can dissolve in water.<\/li>\n\n\n\n<li>C) it produces hydronium ions in solution.<\/li>\n\n\n\n<li>D) it produces hydroxide ions in solution.<\/li>\n<\/ul>\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<p>The correct answer is: <strong>C) it produces hydronium ions in solution.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>An <strong>Arrhenius acid<\/strong> is defined as a substance that increases the concentration of <strong>hydronium ions (H\u2083O\u207a)<\/strong> or simply <strong>hydrogen ions (H\u207a)<\/strong> in aqueous solution. When <strong>hydroiodic acid (HI)<\/strong> dissolves in water, it dissociates completely into <strong>H\u207a<\/strong> ions and <strong>I\u207b<\/strong> ions:<\/p>\n\n\n\n<p>[<br>\\text{HI} \\, (aq) \\rightarrow \\text{H}^+ \\, (aq) + \\text{I}^- \\, (aq)<br>]<\/p>\n\n\n\n<p>The free <strong>H\u207a ions<\/strong> immediately associate with water molecules to form <strong>hydronium ions (H\u2083O\u207a)<\/strong>:<\/p>\n\n\n\n<p>[<br>\\text{H}^+ + \\text{H}_2\\text{O} \\rightarrow \\text{H}_3\\text{O}^+<br>]<\/p>\n\n\n\n<p>Thus, the main characteristic that qualifies HI as an Arrhenius acid is that it produces hydronium ions when dissolved in water.<\/p>\n\n\n\n<p>Now, let&#8217;s look at why the other options are incorrect:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A) it is a polar molecule<\/strong>: While HI is indeed polar (due to the difference in electronegativity between hydrogen and iodine), simply being polar does not necessarily make a molecule an acid. Many polar molecules, like sugar, are not acids.<\/li>\n\n\n\n<li><strong>B) it can dissolve in water<\/strong>: Solubility alone does not make a substance an Arrhenius acid. Some substances dissolve in water without releasing H\u207a ions (for example, salt, NaCl).<\/li>\n\n\n\n<li><strong>D) it produces hydroxide ions in solution<\/strong>: This describes an Arrhenius <strong>base<\/strong>, not an acid. Bases produce OH\u207b ions, not H\u2083O\u207a ions.<\/li>\n<\/ul>\n\n\n\n<p>HI is considered a <strong>strong acid<\/strong> because it dissociates almost completely in water, making it very effective at increasing the H\u2083O\u207a concentration. This property is essential in acid-base chemistry, especially in reactions where the acidity of a solution influences the course of the reaction.<\/p>\n\n\n\n<p>In conclusion, HI is an Arrhenius acid because it increases hydronium ion concentration in water, fitting perfectly into the Arrhenius definition of an acid.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;HI is an Arrhenius acid because The correct answer and explanation is : The correct answer is: C) it produces hydronium ions in solution. Explanation: An Arrhenius acid is defined as a substance that increases the concentration of hydronium ions (H\u2083O\u207a) or simply hydrogen ions (H\u207a) in aqueous solution. When hydroiodic acid (HI) dissolves in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","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-208405","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208405","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=208405"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208405\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=208405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=208405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=208405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}