{"id":204027,"date":"2025-03-21T08:50:08","date_gmt":"2025-03-21T08:50:08","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=204027"},"modified":"2025-03-21T08:50:10","modified_gmt":"2025-03-21T08:50:10","slug":"predict-which-will-be-more-stable-cro4-2%e2%88%92-or-wo4-2%e2%88%92-and-explain","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/21\/predict-which-will-be-more-stable-cro4-2%e2%88%92-or-wo4-2%e2%88%92-and-explain\/","title":{"rendered":"Predict which will be more stable, [CrO4 ] 2\u2212 or [WO4 ] 2\u2212, and explain"},"content":{"rendered":"\n<p>Predict which will be more stable, [CrO4 ] 2\u2212 or [WO4 ] 2\u2212, and explain.<\/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<p>The tungstate ion, ([WO_4]^{2-}), will be more stable than the chromate ion, ([CrO_4]^{2-}).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The stability of oxyanions like ([CrO_4]^{2-}) and ([WO_4]^{2-}) depends on several factors, including <strong>the size and electronegativity of the central metal atom, bond strength, and oxidation state stability<\/strong>.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Atomic Size and Charge Distribution:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tungsten (W) is in <strong>Group 6<\/strong> and belongs to <strong>Period 6<\/strong>, while Chromium (Cr) is in <strong>Period 4<\/strong>.<\/li>\n\n\n\n<li>Being a heavier element, <strong>tungsten has a larger atomic radius<\/strong> than chromium. This larger size allows the negative charge in ([WO_4]^{2-}) to be more <strong>delocalized<\/strong>, reducing electrostatic repulsion and increasing stability.<\/li>\n\n\n\n<li>In contrast, Cr has a <strong>smaller size<\/strong>, leading to a <strong>higher charge density<\/strong>, making ([CrO_4]^{2-}) less stable.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Bond Strength and Covalency:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>W\u2013O bonds in ([WO_4]^{2-}) are stronger than Cr\u2013O bonds in ([CrO_4]^{2-}) because of better orbital overlap and stronger <strong>metal-ligand bonding interactions<\/strong>.<\/li>\n\n\n\n<li>Tungsten exhibits stronger <strong>d-orbital participation<\/strong>, leading to <strong>greater covalency<\/strong> in ([WO_4]^{2-}), which contributes to stability.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Oxidation State Stability:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Both Cr and W exhibit the <strong>+6 oxidation state<\/strong> in their oxyanions, but <strong>W(+6) is more stable<\/strong> than Cr(+6) due to the <strong>inert pair effect<\/strong> in heavier elements.<\/li>\n\n\n\n<li>Cr(+6) is a strong oxidizing agent and tends to get reduced easily, making ([CrO_4]^{2-}) less stable in aqueous environments.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion:<\/h3>\n\n\n\n<p>Due to <strong>better charge delocalization, stronger W\u2013O bonds, and greater stability of the +6 oxidation state<\/strong>, ([WO_4]^{2-}) is more <strong>thermodynamically and kinetically stable<\/strong> than ([CrO_4]^{2-}).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Predict which will be more stable, [CrO4 ] 2\u2212 or [WO4 ] 2\u2212, and explain. The correct answer and explanation is : The tungstate ion, ([WO_4]^{2-}), will be more stable than the chromate ion, ([CrO_4]^{2-}). Explanation: The stability of oxyanions like ([CrO_4]^{2-}) and ([WO_4]^{2-}) depends on several factors, including the size and electronegativity of the [&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-204027","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204027","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=204027"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204027\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=204027"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=204027"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=204027"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}