{"id":248845,"date":"2025-07-08T19:12:04","date_gmt":"2025-07-08T19:12:04","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=248845"},"modified":"2025-07-08T19:12:07","modified_gmt":"2025-07-08T19:12:07","slug":"is-each-compound-soluble-or-insoluble","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/08\/is-each-compound-soluble-or-insoluble\/","title":{"rendered":"\u00a0Is each compound soluble or insoluble"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/07\/image-324.png\" alt=\"\" class=\"wp-image-248846\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here is the determination of solubility for each compound and the identification of ions for the soluble ones.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>(a) (NH\u2084)\u2082S:<\/strong>\u00a0Soluble. Ions present are NH\u2084\u207a and S\u00b2\u207b.<\/li>\n\n\n\n<li><strong>(b) CuCO\u2083:<\/strong>\u00a0Insoluble.<\/li>\n\n\n\n<li><strong>(c) ZnS:<\/strong>\u00a0Insoluble.<\/li>\n\n\n\n<li><strong>(d) Pb(C\u2082H\u2083O\u2082)\u2082:<\/strong>\u00a0Soluble. Ions present are Pb\u00b2\u207a and C\u2082H\u2083O\u2082\u207b.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">To determine if an ionic compound is soluble or insoluble in water, we use a set of established solubility rules. These guidelines help predict whether a compound will dissolve to form a homogeneous solution or remain as a solid precipitate. For compounds that do dissolve, they dissociate into their constituent cations and anions, which move freely within the solution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The first compound,&nbsp;<strong>(a) ammonium sulfide, (NH\u2084)\u2082S<\/strong>, is&nbsp;<strong>soluble<\/strong>. A primary solubility rule states that all common compounds containing the ammonium ion (NH\u2084\u207a) are soluble in water, with no significant exceptions. While most sulfide (S\u00b2\u207b) compounds are insoluble, the rule for the ammonium ion takes precedence. When ammonium sulfide dissolves, it separates into its ions. The chemical formula indicates that for each unit of (NH\u2084)\u2082S, there are two ammonium ions and one sulfide ion. Therefore, the ions present in the solution are the ammonium cation (NH\u2084\u207a) and the sulfide anion (S\u00b2\u207b).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Next,&nbsp;<strong>(b) copper(II) carbonate, CuCO\u2083<\/strong>, is&nbsp;<strong>insoluble<\/strong>. The general rule for carbonates (CO\u2083\u00b2\u207b) is that they are insoluble in water. The only common exceptions are carbonates of Group 1 elements (like sodium and potassium) and the ammonium ion. Since copper (Cu\u00b2\u207a) is a transition metal and not one of these exceptions, copper(II) carbonate does not dissolve in water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Similarly,&nbsp;<strong>(c) zinc sulfide, ZnS<\/strong>, is&nbsp;<strong>insoluble<\/strong>. Most compounds containing the sulfide ion (S\u00b2\u207b) are insoluble. The main exceptions are sulfides of Group 1 cations and the ammonium ion. Zinc (Zn\u00b2\u207a) does not fall into this category of exceptions, so ZnS is classified as an insoluble compound and will form a solid in water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Finally,&nbsp;<strong>(d) lead(II) acetate, Pb(C\u2082H\u2083O\u2082)\u2082<\/strong>, is&nbsp;<strong>soluble<\/strong>. A very reliable solubility rule is that all common acetates (C\u2082H\u2083O\u2082\u207b) are soluble in water. While many lead compounds are known to be insoluble, lead(II) acetate is a prominent exception to this pattern. When it dissolves, it dissociates completely. The formula shows that one unit of lead(II) acetate yields one lead(II) cation (Pb\u00b2\u207a) and two acetate anions (C\u2082H\u2083O\u2082\u207b) in solution.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/07\/learnexams-banner8-330.jpeg\" alt=\"\" class=\"wp-image-248847\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The Correct Answer and Explanation is: Here is the determination of solubility for each compound and the identification of ions for the soluble ones. To determine if an ionic compound is soluble or insoluble in water, we use a set of established solubility rules. These guidelines help predict whether a compound will dissolve to form [&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-248845","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/248845","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=248845"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/248845\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=248845"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=248845"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=248845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}