{"id":192323,"date":"2025-02-17T13:27:53","date_gmt":"2025-02-17T13:27:53","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=192323"},"modified":"2025-02-17T13:27:56","modified_gmt":"2025-02-17T13:27:56","slug":"znco3-a-slightly-soluble-substance-is-least-soluble-in-which-one-of-the-following-solutions-solvents","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/17\/znco3-a-slightly-soluble-substance-is-least-soluble-in-which-one-of-the-following-solutions-solvents\/","title":{"rendered":"ZnCO3, a slightly soluble substance, is least soluble in which one of the following solutions \/ solvents"},"content":{"rendered":"\n

ZnCO3, a slightly soluble substance, is least soluble in which one of the following solutions \/ solvents?
pure water,<\/p>\n\n\n\n

0.2M ZnCl2,<\/p>\n\n\n\n

0.1M Na2CO3 or<\/p>\n\n\n\n

0.1M HCl<\/p>\n\n\n\n

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

The least soluble form of ZnCO\u2083 (zinc carbonate), which is slightly soluble in water, would be in the solution that promotes the common ion effect. The common ion effect refers to the decrease in solubility of a salt when a solution contains an ion that is already a part of the salt.<\/p>\n\n\n\n

Let’s evaluate each option:<\/p>\n\n\n\n

    \n
  1. Pure Water<\/strong>: In pure water, ZnCO\u2083 will dissolve according to its solubility product (Ksp), but without any ions present to affect its solubility, it will dissolve to some extent. Its solubility will be determined solely by its own solubility equilibrium.<\/li>\n\n\n\n
  2. 0.2M ZnCl\u2082<\/strong>: This solution contains Zn\u00b2\u207a ions, which are also part of ZnCO\u2083. The presence of the common ion Zn\u00b2\u207a will shift the solubility equilibrium of ZnCO\u2083 to the left, meaning less ZnCO\u2083 will dissolve in this solution due to the common ion effect. Thus, ZnCO\u2083 will be least soluble in this solution.<\/li>\n\n\n\n
  3. 0.1M Na\u2082CO\u2083<\/strong>: This solution provides CO\u2083\u00b2\u207b ions, which are part of ZnCO\u2083. The presence of a common ion (CO\u2083\u00b2\u207b) would also reduce the solubility of ZnCO\u2083 by shifting the equilibrium to the left. However, it might still be more soluble than in the ZnCl\u2082 solution since Zn\u00b2\u207a ions might have a stronger effect on solubility compared to CO\u2083\u00b2\u207b ions.<\/li>\n\n\n\n
  4. 0.1M HCl<\/strong>: HCl is a strong acid, and it will dissociate completely to produce H\u207a ions. The H\u207a ions will react with CO\u2083\u00b2\u207b ions from ZnCO\u2083 to form CO\u2082 and water, driving the dissolution of ZnCO\u2083. This would result in ZnCO\u2083 being more soluble in the presence of HCl.<\/li>\n<\/ol>\n\n\n\n

    Correct Answer<\/strong>: 0.2M ZnCl\u2082<\/strong>. The common ion effect from the Zn\u00b2\u207a ions in ZnCl\u2082 will make ZnCO\u2083 the least soluble in this solution.<\/p>\n\n\n\n

    Explanation Summary:<\/h3>\n\n\n\n
      \n
    • In pure water, the solubility is governed by the salt\u2019s own Ksp.<\/li>\n\n\n\n
    • The 0.2M ZnCl\u2082 solution provides Zn\u00b2\u207a, a common ion that decreases the solubility of ZnCO\u2083.<\/li>\n\n\n\n
    • The 0.1M Na\u2082CO\u2083 introduces CO\u2083\u00b2\u207b, another common ion, which also reduces solubility but likely less effectively than Zn\u00b2\u207a.<\/li>\n\n\n\n
    • The 0.1M HCl dissociates to produce H\u207a, which neutralizes CO\u2083\u00b2\u207b and increases ZnCO\u2083 solubility.<\/li>\n<\/ul>\n\n\n\n

      Let me know if you’d like me to generate the image showing the common ion effect and solubility equilibrium!<\/p>\n","protected":false},"excerpt":{"rendered":"

      ZnCO3, a slightly soluble substance, is least soluble in which one of the following solutions \/ solvents?pure water, 0.2M ZnCl2, 0.1M Na2CO3 or 0.1M HCl The Correct Answer and Explanation is : The least soluble form of ZnCO\u2083 (zinc carbonate), which is slightly soluble in water, would be in the solution that promotes the common […]<\/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-192323","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/192323","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=192323"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/192323\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=192323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=192323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=192323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}