{"id":208767,"date":"2025-04-28T05:59:49","date_gmt":"2025-04-28T05:59:49","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=208767"},"modified":"2025-04-28T05:59:51","modified_gmt":"2025-04-28T05:59:51","slug":"the-name-of-the-ionic-compound-cr3po42-is","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/28\/the-name-of-the-ionic-compound-cr3po42-is\/","title":{"rendered":"The name of the ionic compound Cr3(PO4)2 is"},"content":{"rendered":"\n

The name of the ionic compound Cr3(PO4)2 is<\/p>\n\n\n\n

chromium(III) phosphate
trichromium diphosphate
chromium phosphide
chromium(II) phosphate<\/p>\n\n\n\n

The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n

The correct name for the ionic compound Cr\u2083(PO\u2084)\u2082 is chromium(II) phosphate<\/strong>.<\/p>\n\n\n\n

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

To properly name an ionic compound, we must follow the standard rules for naming binary ionic compounds, which typically consist of a metal and a nonmetal, as well as compounds involving polyatomic ions. Here’s the step-by-step breakdown for naming Cr\u2083(PO\u2084)\u2082:<\/p>\n\n\n\n

    \n
  1. Identifying the Metal Ion<\/strong>: The metal in the compound is chromium (Cr). Chromium is a transition metal, and like other transition metals, it can form ions with multiple charges. In this case, we need to determine the charge of the chromium ion.<\/li>\n<\/ol>\n\n\n\n
      \n
    • The phosphate ion (PO\u2084\u00b3\u207b) has a charge of -3.<\/li>\n\n\n\n
    • The formula Cr\u2083(PO\u2084)\u2082 suggests there are 3 chromium ions and 2 phosphate ions. To balance the charges, the total positive charge from the chromium ions must equal the total negative charge from the phosphate ions.<\/li>\n\n\n\n
    • Since the phosphate ions contribute a total of -6 charge (2 \u00d7 -3 = -6), the total positive charge must be +6 to neutralize the compound.<\/li>\n\n\n\n
    • Therefore, each chromium ion must have a charge of +2 (because 3 \u00d7 +2 = +6). Hence, the chromium ion in this compound has a charge of +2.<\/li>\n<\/ul>\n\n\n\n
        \n
      1. Naming the Metal Ion<\/strong>: In the case of transition metals that can have more than one possible charge, we specify the charge in parentheses after the metal’s name. Since chromium has a charge of +2 in this compound, we use chromium(II)<\/strong>.<\/li>\n\n\n\n
      2. Identifying the Polyatomic Ion<\/strong>: The polyatomic ion in the compound is phosphate (PO\u2084\u00b3\u207b). The name of this ion is always phosphate<\/strong>.<\/li>\n\n\n\n
      3. Combining the Names<\/strong>: Putting it all together, the compound is named chromium(II) phosphate<\/strong>, where “chromium(II)” indicates the +2 charge on the chromium ions, and “phosphate” is the name of the polyatomic ion.<\/li>\n<\/ol>\n\n\n\n

        Why Other Options Are Incorrect:<\/h3>\n\n\n\n
          \n
        • Chromium(III) phosphate<\/strong>: This would imply that chromium has a +3 charge, which is not the case here. The correct charge is +2.<\/li>\n\n\n\n
        • Trichromium diphosphate<\/strong>: This is an incorrect naming convention. It suggests there are three chromium atoms and two phosphate groups, but it omits the necessary indication of chromium’s charge.<\/li>\n\n\n\n
        • Chromium phosphide<\/strong>: Phosphide refers to the ion PO\u2084\u00b3\u207b in a compound with a metal, but it does not apply here, as “phosphide” is typically used for ionic compounds where the metal forms a bond with phosphorus (P), not phosphate (PO\u2084\u00b3\u207b).<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

          The name of the ionic compound Cr3(PO4)2 is chromium(III) phosphatetrichromium diphosphatechromium phosphidechromium(II) phosphate The correct answer and explanation is : The correct name for the ionic compound Cr\u2083(PO\u2084)\u2082 is chromium(II) phosphate. Explanation: To properly name an ionic compound, we must follow the standard rules for naming binary ionic compounds, which typically consist of a metal […]<\/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-208767","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208767","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=208767"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208767\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=208767"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=208767"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=208767"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}