Phosphate, PO43\u2212, is a polyatomic ion that can combine with any cation to form an ionic compound.
Identify all the formulas below that correctly represent phosphate compounds.
Select one or more:
Combined with lithium: Li3PO4
Combined with iron(III): Fe3(PO4)3
Combined with iron(III): FePO4
Combined with copper(I): Cu3PO4
Combined with copper(I): (Cu)3PO4
Combined with magnesium: Mg3(PO4)2
Combined with magnesium: Mg2(PO4)3
Combined with lithium: Li2PO4<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n To determine which formulas correctly represent phosphate compounds, we must follow these steps:<\/p>\n\n\n\n Phosphate ((PO_4^{3-})) is a polyatomic ion with a charge of -3. To form a neutral compound, the total positive charge of the cations must balance the -3 charge of phosphate.<\/p>\n\n\n\n Formulas of ionic compounds are based on charge neutrality. The charges of the cations and anions must cancel out to produce a compound with no net charge. Using this principle, we balance the number of ions needed for each compound.<\/p>\n","protected":false},"excerpt":{"rendered":" Phosphate, PO43\u2212, is a polyatomic ion that can combine with any cation to form an ionic compound.Identify all the formulas below that correctly represent phosphate compounds.Select one or more:Combined with lithium: Li3PO4Combined with iron(III): Fe3(PO4)3Combined with iron(III): FePO4Combined with copper(I): Cu3PO4Combined with copper(I): (Cu)3PO4Combined with magnesium: Mg3(PO4)2Combined with magnesium: Mg2(PO4)3Combined with lithium: Li2PO4 The Correct […]<\/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-168017","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168017","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=168017"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168017\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=168017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=168017"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=168017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}1. Understand the phosphate ion charge<\/strong><\/h3>\n\n\n\n
2. Analyze each formula<\/strong><\/h3>\n\n\n\n
\n
Lithium has a charge of +1. To balance the -3 charge of (PO_4^{3-}), three (Li^+) ions are required. Correct formula: (Li_3PO_4)<\/strong>.
The formula (Li_2PO_4) is incorrect because it does not balance the charge.<\/li>\n\n\n\n
Iron(III) has a charge of +3. One (Fe^{3+}) ion can balance one (PO_4^{3-}). Correct formula: (FePO_4)<\/strong>.
The formula (Fe_3(PO_4)_3) is mathematically correct (3:3 ratio), but it simplifies to (FePO_4), so it is redundant but valid.<\/li>\n\n\n\n
Copper(I) has a charge of +1. Three (Cu^+) ions are needed to balance the -3 charge of phosphate. Correct formula: (Cu_3PO_4)<\/strong>.
The formula ((Cu)_3PO_4) is incorrect because parentheses are unnecessary for a single element.<\/li>\n\n\n\n
Magnesium has a charge of +2. To balance (PO_4^{3-}), a ratio of 3 (Mg^{2+}) to 2 (PO_4^{3-}) is needed. Correct formula: (Mg_3(PO_4)_2)<\/strong>.
The formula (Mg_2(PO_4)_3) is incorrect because the charges do not balance.<\/li>\n<\/ul>\n\n\n\nCorrect Formulas<\/h3>\n\n\n\n
\n
Explanation<\/h3>\n\n\n\n