{"id":180922,"date":"2025-01-09T08:12:09","date_gmt":"2025-01-09T08:12:09","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=180922"},"modified":"2025-01-09T08:12:11","modified_gmt":"2025-01-09T08:12:11","slug":"the-formula-of-the-ionic-compound","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/09\/the-formula-of-the-ionic-compound\/","title":{"rendered":"The formula of the ionic compound"},"content":{"rendered":"\n<p>The formula of the ionic compound, gold(II) nitrite is (A) AuNO2(B) Au3N2(C) Au(NO3)2(D) Au(NO2)2<\/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 correct formula for gold(II) nitrite is <strong>(D) Au(NO2)2<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>Gold(II) indicates that gold has a +2 oxidation state, which is critical for determining the compound&#8217;s formula. In ionic compounds, the oxidation states of the elements determine the ratio of ions in the formula. Nitrite, NO2\u2212, has a \u22121 charge.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Gold(II)<\/strong> means that gold has a +2 charge, so the gold ion is Au\u00b2\u207a.<\/li>\n\n\n\n<li><strong>Nitrite<\/strong> (NO2\u2212) is an anion with a \u22121 charge.<\/li>\n<\/ul>\n\n\n\n<p>For the compound to be electrically neutral, the charges of the gold cations and nitrite anions must balance. Since the gold ion has a +2 charge, two nitrite ions (each with a \u22121 charge) are required to balance the +2 charge. Therefore, the formula is Au(NO2)2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step-by-step reasoning:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Determine the charge of gold(II)<\/strong>: The Roman numeral (II) tells us that gold is in the +2 oxidation state, so the gold ion is Au\u00b2\u207a.<\/li>\n\n\n\n<li><strong>Determine the charge of nitrite<\/strong>: The nitrite ion (NO2\u2212) has a charge of \u22121.<\/li>\n\n\n\n<li><strong>Balance the charges<\/strong>: To balance the +2 charge of gold, we need two nitrite ions, each with a \u22121 charge. Thus, the formula is Au(NO2)2.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Why not the other options?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>(A) AuNO2<\/strong>: This would suggest that one Au\u00b2\u207a ion balances one NO2\u2212 ion, but the charges do not add up to zero. Gold(II) requires two nitrite ions to balance the charge.<\/li>\n\n\n\n<li><strong>(B) Au3N2<\/strong>: This is a formula for gold(III) nitride, where gold would have a +3 oxidation state, not +2.<\/li>\n\n\n\n<li><strong>(C) Au(NO3)2<\/strong>: This is the formula for gold(II) nitrate, not nitrite. Nitrate (NO3\u2212) is different from nitrite (NO2\u2212), which has a different formula.<\/li>\n<\/ul>\n\n\n\n<p>Thus, the correct answer is <strong>(D) Au(NO2)2<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The formula of the ionic compound, gold(II) nitrite is (A) AuNO2(B) Au3N2(C) Au(NO3)2(D) Au(NO2)2 The Correct Answer and Explanation is : The correct formula for gold(II) nitrite is (D) Au(NO2)2. Explanation: Gold(II) indicates that gold has a +2 oxidation state, which is critical for determining the compound&#8217;s formula. In ionic compounds, the oxidation states of [&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-180922","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/180922","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=180922"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/180922\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=180922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=180922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=180922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}