{"id":195502,"date":"2025-02-28T10:18:15","date_gmt":"2025-02-28T10:18:15","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=195502"},"modified":"2025-02-28T10:18:18","modified_gmt":"2025-02-28T10:18:18","slug":"in-copperii-phosphate","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/28\/in-copperii-phosphate\/","title":{"rendered":"In copper(II) phosphate"},"content":{"rendered":"\n

In copper(II) phosphate, which one of the following statements is false?
a) The oxidation number of oxygen is -2 .
b) The oxidation number of the phosphate ion is -3 .
c) The oxidation number of copper is +2 .
d) The oxidation number of phosphorus is +5 .<\/p>\n\n\n\n

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

The false statement is:<\/p>\n\n\n\n

b) The oxidation number of the phosphate ion is -3.<\/strong><\/p>\n\n\n\n

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

Copper(II) phosphate is a compound with the chemical formula Cu\u2083(PO\u2084)\u2082<\/strong>. To determine which statement is false, let’s analyze each oxidation state.<\/p>\n\n\n\n

    \n
  1. Oxidation Number of Oxygen (-2) (Statement a – True):<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n
    • Oxygen in most compounds (except peroxides and superoxides) has an oxidation number of -2<\/strong>.<\/li>\n\n\n\n
    • In phosphate (PO\u2084\u00b3\u207b<\/strong>), each of the four oxygens has an oxidation state of -2<\/strong>.<\/li>\n<\/ul>\n\n\n\n
        \n
      1. Oxidation Number of the Phosphate Ion (Statement b – False):<\/strong><\/li>\n<\/ol>\n\n\n\n
          \n
        • The phosphate ion (PO\u2084\u00b3\u207b)<\/strong> itself has an overall charge of -3<\/strong>, but the statement refers to its oxidation number as a whole.<\/li>\n\n\n\n
        • The oxidation number of an ion represents the charge of the central atom, not the entire ion.<\/li>\n\n\n\n
        • The correct term should be the charge of the phosphate ion is -3<\/strong>, rather than its oxidation number.<\/li>\n<\/ul>\n\n\n\n
            \n
          1. Oxidation Number of Copper (+2) (Statement c – True):<\/strong><\/li>\n<\/ol>\n\n\n\n
              \n
            • Copper(II) refers to the +2 oxidation state of Cu<\/strong>.<\/li>\n\n\n\n
            • The formula Cu\u2083(PO\u2084)\u2082<\/strong> means that three Cu\u00b2\u207a ions balance two PO\u2084\u00b3\u207b ions.<\/li>\n<\/ul>\n\n\n\n
                \n
              1. Oxidation Number of Phosphorus (+5) (Statement d – True):<\/strong><\/li>\n<\/ol>\n\n\n\n
                  \n
                • In PO\u2084\u00b3\u207b<\/strong>, let the oxidation number of phosphorus be x<\/strong>:
                  [
                  x + (4 \\times -2) = -3
                  ]
                  [
                  x – 8 = -3
                  ]
                  [
                  x = +5
                  ]<\/li>\n\n\n\n
                • This confirms that phosphorus has an oxidation number of +5<\/strong>.<\/li>\n<\/ul>\n\n\n\n

                  Since statement (b) incorrectly describes the oxidation number of the phosphate ion, it is the false statement. Now, I will generate an image representing copper(II) phosphate.<\/p>\n\n\n\n

                  \"\"<\/figure>\n\n\n\n

                  Here is a 3D molecular model of Copper(II) Phosphate (Cu\u2083(PO\u2084)\u2082), visually representing the ionic interactions between Cu\u00b2\u207a ions and phosphate groups. Let me know if you need any modifications or further clarifications!<\/p>\n","protected":false},"excerpt":{"rendered":"

                  In copper(II) phosphate, which one of the following statements is false?a) The oxidation number of oxygen is -2 .b) The oxidation number of the phosphate ion is -3 .c) The oxidation number of copper is +2 .d) The oxidation number of phosphorus is +5 . The Correct Answer and Explanation is : The false statement […]<\/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-195502","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/195502","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=195502"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/195502\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=195502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=195502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=195502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}