{"id":260232,"date":"2025-07-19T09:59:30","date_gmt":"2025-07-19T09:59:30","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=260232"},"modified":"2025-07-19T09:59:32","modified_gmt":"2025-07-19T09:59:32","slug":"determine-the-formula-or-molecular-mass-of-lead-ii-phosphate","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/19\/determine-the-formula-or-molecular-mass-of-lead-ii-phosphate\/","title":{"rendered":"determine the formula or molecular mass of lead (II) phosphate"},"content":{"rendered":"\n

determine the formula or molecular mass of lead (II) phosphate.<\/p>\n\n\n\n

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

The formula for lead (II) phosphate is Pb\u2083(PO\u2084)\u2082<\/strong>.<\/p>\n\n\n\n

To explain this, let\u2019s break down the components:<\/p>\n\n\n\n

    \n
  1. Lead (II)<\/strong> refers to lead with a +2 charge. This means that a single lead ion (Pb\u00b2\u207a) will need to combine with other ions in such a way that the total charge is neutral.<\/li>\n\n\n\n
  2. Phosphate (PO\u2084)\u00b3\u207b<\/strong> is a polyatomic ion with a -3 charge. Phosphate contains one phosphorus atom bonded to four oxygen atoms, and this ion has an overall charge of -3.<\/li>\n<\/ol>\n\n\n\n

    Now, we need to balance the charges of the lead and phosphate ions in the formula. Since lead (II) has a +2 charge and phosphate has a -3 charge, it will take more than one phosphate ion to balance the charge of lead.<\/p>\n\n\n\n

    To achieve charge neutrality:<\/p>\n\n\n\n

      \n
    • Three Pb\u00b2\u207a ions will give a total positive charge of +6.<\/li>\n\n\n\n
    • Two PO\u2084\u00b3\u207b ions will give a total negative charge of -6.<\/li>\n<\/ul>\n\n\n\n

      Therefore, the formula must include three lead ions (Pb) and two phosphate ions (PO\u2084), resulting in the formula Pb\u2083(PO\u2084)\u2082<\/strong>.<\/p>\n\n\n\n

      Next, to calculate the molecular mass:<\/p>\n\n\n\n

        \n
      • The molar mass of lead (Pb) is approximately 207.2 g\/mol.<\/li>\n\n\n\n
      • The molar mass of phosphorus (P) is approximately 30.97 g\/mol.<\/li>\n\n\n\n
      • The molar mass of oxygen (O) is approximately 16.00 g\/mol.<\/li>\n<\/ul>\n\n\n\n

        The molecular mass is calculated as follows:<\/p>\n\n\n\n

          \n
        • For lead: 3 \u00d7 207.2 = 621.6 g\/mol<\/li>\n\n\n\n
        • For phosphate: 2 \u00d7 (30.97 + 4 \u00d7 16.00) = 2 \u00d7 (30.97 + 64.00) = 2 \u00d7 94.97 = 189.94 g\/mol<\/li>\n<\/ul>\n\n\n\n

          Now, add these together:<\/p>\n\n\n\n

            \n
          • 621.6 + 189.94 = 811.54 g\/mol<\/strong><\/li>\n<\/ul>\n\n\n\n

            Thus, the molecular mass of lead (II) phosphate (Pb\u2083(PO\u2084)\u2082) is approximately 811.54 g\/mol<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

            determine the formula or molecular mass of lead (II) phosphate. The correct answer and explanation is: The formula for lead (II) phosphate is Pb\u2083(PO\u2084)\u2082. To explain this, let\u2019s break down the components: Now, we need to balance the charges of the lead and phosphate ions in the formula. Since lead (II) has a +2 charge […]<\/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-260232","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/260232","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=260232"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/260232\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=260232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=260232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=260232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}