{"id":167010,"date":"2024-11-14T17:54:50","date_gmt":"2024-11-14T17:54:50","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=167010"},"modified":"2024-11-14T17:54:54","modified_gmt":"2024-11-14T17:54:54","slug":"which-of-these-equations-correctly-expresses-the-self-ionization-of-water","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/11\/14\/which-of-these-equations-correctly-expresses-the-self-ionization-of-water\/","title":{"rendered":"Which of these equations correctly expresses the self-ionization of water"},"content":{"rendered":"\n

Which of these equations correctly expresses the self-ionization of water?
A. H\u2082O+H\u2082O \u2192 H\u2082O + OH
B. H\u2082O + H\u2082O 20H\u2122
C. H\u2082O+H\u2082O \u2192 2H\u2082O*
D. H\u2082O+H\u2082O H\u2082O + OH<\/p>\n\n\n\n

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

The correct answer is D. H\u2082O + H\u2082O \u2192 H\u2083O\u207a + OH\u207b<\/strong>.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

Water undergoes self-ionization<\/strong>, which refers to the process where two water molecules interact, one donating a proton (H\u207a) to the other, resulting in the formation of hydronium ions (H\u2083O\u207a) and hydroxide ions (OH\u207b). This is a reversible reaction, and it is important for understanding the concept of pH and the balance of acids and bases in aqueous solutions.<\/p>\n\n\n\n

The self-ionization of water can be written as:<\/p>\n\n\n\n

[
H\u2082O + H\u2082O \\rightleftharpoons H\u2083O\u207a + OH\u207b
]<\/p>\n\n\n\n

Here\u2019s a breakdown of the process:<\/p>\n\n\n\n

    \n
  1. Proton Transfer:<\/strong> A water molecule (H\u2082O) donates a proton (H\u207a) to another water molecule, forming a hydronium ion (H\u2083O\u207a) and leaving behind a hydroxide ion (OH\u207b).<\/li>\n\n\n\n
  2. Dynamic Equilibrium:<\/strong> This reaction occurs in equilibrium, meaning that the rate of ionization (formation of H\u2083O\u207a and OH\u207b) is equal to the rate of recombination (H\u2083O\u207a and OH\u207b ions combining to form H\u2082O). This ensures that the concentrations of H\u2083O\u207a and OH\u207b in pure water are equal.<\/li>\n\n\n\n
  3. Concentrations in Pure Water:<\/strong> In pure water at 25\u00b0C, the concentration of H\u2083O\u207a and OH\u207b ions is both (1.0 \\times 10^{-7}) M. This results in a neutral pH of 7 because pH is defined as the negative logarithm of the hydrogen ion concentration, and in pure water, the concentrations of H\u2083O\u207a and OH\u207b are equal.<\/li>\n<\/ol>\n\n\n\n

    Why the other options are incorrect:<\/h3>\n\n\n\n
      \n
    • A. H\u2082O + H\u2082O \u2192 H\u2082O + OH\u207b:<\/strong> This equation is incorrect because it does not show the formation of the hydronium ion (H\u2083O\u207a), which is a product of the ionization.<\/li>\n\n\n\n
    • B. H\u2082O + H\u2082O \u2192 20H\u2122:<\/strong> This equation is nonsensical and does not represent a valid chemical reaction or species.<\/li>\n\n\n\n
    • C. H\u2082O + H\u2082O \u2192 2H\u2082O:<\/strong> This suggests a reaction that results in the same molecules as reactants, which is not the process of ionization. It doesn\u2019t show any ion formation.<\/li>\n<\/ul>\n\n\n\n

      Thus, D<\/strong> is the correct expression for the self-ionization of water.<\/p>\n","protected":false},"excerpt":{"rendered":"

      Which of these equations correctly expresses the self-ionization of water?A. H\u2082O+H\u2082O \u2192 H\u2082O + OHB. H\u2082O + H\u2082O 20H\u2122C. H\u2082O+H\u2082O \u2192 2H\u2082O*D. H\u2082O+H\u2082O H\u2082O + OH The Correct Answer and Explanation is: The correct answer is D. H\u2082O + H\u2082O \u2192 H\u2083O\u207a + OH\u207b. Explanation: Water undergoes self-ionization, which refers to the process where two […]<\/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-167010","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/167010","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=167010"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/167010\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=167010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=167010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=167010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}