{"id":237319,"date":"2025-06-17T06:53:01","date_gmt":"2025-06-17T06:53:01","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=237319"},"modified":"2025-06-17T06:53:04","modified_gmt":"2025-06-17T06:53:04","slug":"give-the-name-from-the-formula-or-the-formula-from-the-name-for-each-of-the-following-hydrated-ionic-compounds","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/17\/give-the-name-from-the-formula-or-the-formula-from-the-name-for-each-of-the-following-hydrated-ionic-compounds\/","title":{"rendered":"Give the name from the formula or the formula from the name for each of the following hydrated ionic compounds"},"content":{"rendered":"\n<p>Give the name from the formula or the formula from the name for each of the following hydrated ionic compounds. Part A FeI2\u00e2\u2039\u20264H2O Spell out the full name of the compound. Part B nickel(II) nitrate heptahydrate Express your answer as a chemical formula. Part D beryllium sulfite tetrahydrate Express your answer as a chemical formula.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>Here are the correct answers for each part:<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Part A: FeI\u2082\u00b74H\u2082O<\/strong><br><strong>Name: Iron(II) iodide tetrahydrate<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><br>To name this compound, start with the ionic portion:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fe<\/strong> is the symbol for iron. Since iron is a transition metal that can have more than one possible charge, we need to determine its charge.<\/li>\n\n\n\n<li>The subscript <strong>2<\/strong> on <strong>I<\/strong> (iodide) shows there are two iodide ions (I\u207b), each with a -1 charge, for a total of -2. Therefore, iron must have a +2 charge to balance the -2 from the iodide ions.<\/li>\n\n\n\n<li>Iron with a +2 charge is written as <strong>iron(II)<\/strong>.<\/li>\n\n\n\n<li>Iodine forms the <strong>iodide<\/strong> ion (I\u207b), so FeI\u2082 is named <strong>iron(II) iodide<\/strong>.<\/li>\n\n\n\n<li>The <strong>\u00b74H\u2082O<\/strong> indicates four water molecules are attached to each formula unit of the salt. This is written as <strong>tetrahydrate<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>Thus, the full name is <strong>iron(II) iodide tetrahydrate<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Part B: Nickel(II) nitrate heptahydrate<\/strong><br><strong>Formula: Ni(NO\u2083)\u2082\u00b77H\u2082O<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nickel(II)<\/strong> means the nickel ion has a +2 charge (<strong>Ni\u00b2\u207a<\/strong>).<\/li>\n\n\n\n<li><strong>Nitrate<\/strong> is a polyatomic ion with the formula <strong>NO\u2083\u207b<\/strong> and a -1 charge.<\/li>\n\n\n\n<li>To balance the +2 from nickel, two nitrate ions are needed: <strong>(NO\u2083)\u2082<\/strong>.<\/li>\n\n\n\n<li><strong>Heptahydrate<\/strong> means seven water molecules are attached.<\/li>\n<\/ul>\n\n\n\n<p>So, the formula is <strong>Ni(NO\u2083)\u2082\u00b77H\u2082O<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Part D: Beryllium sulfite tetrahydrate<\/strong><br><strong>Formula: BeSO\u2083\u00b74H\u2082O<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Beryllium<\/strong> is a Group 2 metal with a +2 charge (<strong>Be\u00b2\u207a<\/strong>).<\/li>\n\n\n\n<li><strong>Sulfite<\/strong> is the polyatomic ion <strong>SO\u2083\u00b2\u207b<\/strong> with a -2 charge.<\/li>\n\n\n\n<li>One beryllium ion and one sulfite ion balance each other: <strong>BeSO\u2083<\/strong>.<\/li>\n\n\n\n<li><strong>Tetrahydrate<\/strong> means four water molecules are included.<\/li>\n<\/ul>\n\n\n\n<p>Therefore, the formula is <strong>BeSO\u2083\u00b74H\u2082O<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>In summary:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Part A<\/strong>: Iron(II) iodide tetrahydrate<\/li>\n\n\n\n<li><strong>Part B<\/strong>: Ni(NO\u2083)\u2082\u00b77H\u2082O<\/li>\n\n\n\n<li><strong>Part D<\/strong>: BeSO\u2083\u00b74H\u2082O<\/li>\n<\/ul>\n\n\n\n<p>Hydrated ionic compounds are named by combining the salt name with a Greek prefix indicating the number of water molecules.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-812.jpeg\" alt=\"\" class=\"wp-image-237320\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Give the name from the formula or the formula from the name for each of the following hydrated ionic compounds. Part A FeI2\u00e2\u2039\u20264H2O Spell out the full name of the compound. Part B nickel(II) nitrate heptahydrate Express your answer as a chemical formula. Part D beryllium sulfite tetrahydrate Express your answer as a chemical formula. [&hellip;]<\/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-237319","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/237319","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=237319"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/237319\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=237319"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=237319"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=237319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}