{"id":233057,"date":"2025-06-12T13:49:26","date_gmt":"2025-06-12T13:49:26","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=233057"},"modified":"2025-06-12T13:49:28","modified_gmt":"2025-06-12T13:49:28","slug":"which-compound-is-soluble-in-water","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/12\/which-compound-is-soluble-in-water\/","title":{"rendered":"Which compound is soluble in water"},"content":{"rendered":"\n

Which compound is soluble in water? PbS AgI Fe(OH): CuBr2<\/p>\n\n\n\n

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

The correct answer is: CuBr\u2082 (Copper(II) bromide)<\/strong> is soluble<\/strong> in water.<\/p>\n\n\n\n

\n\n\n\n

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

To determine the solubility of ionic compounds in water, chemists rely on solubility rules<\/strong>\u2014guidelines based on experimental evidence about how different combinations of ions behave in aqueous solutions.<\/p>\n\n\n\n

Let\u2019s examine each compound using the solubility rules:<\/p>\n\n\n\n

    \n
  1. PbS (Lead(II) sulfide)<\/strong>\n
      \n
    • Rule:<\/strong> Most sulfides (S\u00b2\u207b) are insoluble<\/strong>, except<\/strong> those of alkali metals (e.g., Na\u207a, K\u207a), ammonium (NH\u2084\u207a), and some alkaline earth metals.<\/li>\n\n\n\n
    • Pb\u00b2\u207a<\/strong> is not an exception.<\/li>\n\n\n\n
    • \u2705 Insoluble<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • AgI (Silver iodide)<\/strong>\n
        \n
      • Rule:<\/strong> Most halides (Cl\u207b, Br\u207b, I\u207b) are soluble<\/strong>, except<\/strong> those of silver (Ag\u207a), lead (Pb\u00b2\u207a), and mercury (Hg\u2082\u00b2\u207a).<\/li>\n\n\n\n
      • Ag\u207a is an exception.<\/li>\n\n\n\n
      • \u2705 Insoluble<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • Fe(OH)\u2083 (Iron(III) hydroxide)<\/strong>\n
          \n
        • Rule:<\/strong> Most hydroxides (OH\u207b) are insoluble<\/strong>, except<\/strong> those of alkali metals and some alkaline earth metals (like Ba\u00b2\u207a).<\/li>\n\n\n\n
        • Iron is not an exception.<\/li>\n\n\n\n
        • \u2705 Insoluble<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n
        • CuBr\u2082 (Copper(II) bromide)<\/strong>\n
            \n
          • Rule:<\/strong> Most halides (like Br\u207b) are soluble<\/strong>, except<\/strong> those of Ag\u207a, Pb\u00b2\u207a, and Hg\u2082\u00b2\u207a.<\/li>\n\n\n\n
          • Cu\u00b2\u207a is not an exception.<\/li>\n\n\n\n
          • \u2705 Soluble<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
            \n\n\n\n

            Why CuBr\u2082 is Soluble:<\/h3>\n\n\n\n

            When CuBr\u2082 is placed in water, it dissociates into Cu\u00b2\u207a and 2Br\u207b ions:CuBr2(s)\u2192Cu2+(aq)+2Br\u2212(aq)\\text{CuBr}_2 (s) \\rightarrow \\text{Cu}^{2+} (aq) + 2\\text{Br}^- (aq)CuBr2\u200b(s)\u2192Cu2+(aq)+2Br\u2212(aq)<\/p>\n\n\n\n

            Water\u2019s polarity allows it to surround and stabilize these ions, leading to the compound dissolving readily. Because bromide salts are generally soluble (except when combined with Ag\u207a, Pb\u00b2\u207a, or Hg\u2082\u00b2\u207a), CuBr\u2082<\/strong> follows the rule and is soluble in water<\/strong>.<\/p>\n\n\n\n

            \n\n\n\n

            Final Answer: CuBr\u2082 is soluble in water.<\/strong><\/p>\n\n\n\n

            \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

            Which compound is soluble in water? PbS AgI Fe(OH): CuBr2 The Correct Answer and Explanation is: The correct answer is: CuBr\u2082 (Copper(II) bromide) is soluble in water. Explanation: To determine the solubility of ionic compounds in water, chemists rely on solubility rules\u2014guidelines based on experimental evidence about how different combinations of ions behave in aqueous […]<\/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-233057","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233057","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=233057"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233057\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=233057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=233057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=233057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}