{"id":180524,"date":"2025-01-07T07:54:13","date_gmt":"2025-01-07T07:54:13","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=180524"},"modified":"2025-01-07T07:54:15","modified_gmt":"2025-01-07T07:54:15","slug":"p3-p2-question-8-which-formula-name-pair-is-incorrect","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/07\/p3-p2-question-8-which-formula-name-pair-is-incorrect\/","title":{"rendered":"p^(3+) p^(2+) Question 8 Which formula\/name pair is incorrect"},"content":{"rendered":"\n<p>p^(3+) p^(2+) Question 8 Which formula\/name pair is incorrect? Fe_(3)SO_(3) iron (III) sulfite FeSO_(3) iron(II)sulfite FeS iron(II)sulfide FeSO_(4) iron (II) sulfate Fe_(2)S_(3) iron (III)sulfide Question 9 Which one of the following molecular formulas represents an empirical formula?<\/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<h3 class=\"wp-block-heading\">Question 8: Incorrect Formula\/Name Pair<\/h3>\n\n\n\n<p>The formula\/name pair that is incorrect is:<\/p>\n\n\n\n<p><strong>FeSO\u2083 &#8211; iron (II) sulfite<\/strong><\/p>\n\n\n\n<p>Explanation:<br>FeSO\u2083 refers to <strong>iron (II) sulfite<\/strong>, which is <strong>incorrect<\/strong> because the sulfite ion (SO\u2083\u00b2\u207b) forms salts with both iron (II) and iron (III), but <strong>iron (III)<\/strong>, not iron (II), is the most common oxidation state for iron when combined with the sulfite ion.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fe\u2083SO\u2083<\/strong> (iron (III) sulfite) is a correct name and formula pair, indicating iron in the +3 oxidation state combined with sulfite.<\/li>\n\n\n\n<li><strong>FeSO\u2083<\/strong> should be <strong>iron (III) sulfite<\/strong>, not iron (II) sulfite, as iron (III) typically forms iron (III) sulfite, and iron (II) would form iron (II) sulfite, with a different formula, FeSO\u2083.<\/li>\n<\/ul>\n\n\n\n<p>Thus, <strong>FeSO\u2083 should be iron (III) sulfite<\/strong>, not iron (II) sulfite.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Question 9: Empirical Formula<\/h3>\n\n\n\n<p>An <strong>empirical formula<\/strong> represents the simplest whole-number ratio of the elements in a compound. It does not necessarily reflect the actual number of atoms in a molecule but rather their simplest ratio.<\/p>\n\n\n\n<p>To determine the empirical formula, reduce the number of atoms of each element in the molecular formula to their simplest ratio.<\/p>\n\n\n\n<p>If given molecular formulas for several compounds, the correct empirical formula would be the one that expresses the smallest ratio of the elements in the formula.<\/p>\n\n\n\n<p>For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If a molecular formula is <strong>C\u2086H\u2081\u2082<\/strong>, the empirical formula would be <strong>CH\u2082<\/strong>, because both carbon and hydrogen have the same ratio of 1:2.<\/li>\n\n\n\n<li>A formula like <strong>C\u2086H\u2081\u2082O\u2086<\/strong> (glucose) is a molecular formula, and its empirical formula would be <strong>CH\u2082O<\/strong>, as it represents the simplest whole-number ratio of the elements.<\/li>\n<\/ul>\n\n\n\n<p>If you have specific formulas from the options, I can help identify which one is an empirical formula, but in general, it will be the one with the simplest ratio of atoms.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>p^(3+) p^(2+) Question 8 Which formula\/name pair is incorrect? Fe_(3)SO_(3) iron (III) sulfite FeSO_(3) iron(II)sulfite FeS iron(II)sulfide FeSO_(4) iron (II) sulfate Fe_(2)S_(3) iron (III)sulfide Question 9 Which one of the following molecular formulas represents an empirical formula? The Correct Answer and Explanation is : Question 8: Incorrect Formula\/Name Pair The formula\/name pair that is incorrect [&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-180524","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/180524","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=180524"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/180524\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=180524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=180524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=180524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}