{"id":232733,"date":"2025-06-12T06:11:44","date_gmt":"2025-06-12T06:11:44","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=232733"},"modified":"2025-06-12T06:11:47","modified_gmt":"2025-06-12T06:11:47","slug":"zinc-oxide-is-found-in-ointments-for-the-skin","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/12\/zinc-oxide-is-found-in-ointments-for-the-skin\/","title":{"rendered":"Zinc oxide is found in ointments for the skin"},"content":{"rendered":"\n<p><br>Zinc oxide is found in ointments for the skin. What formula best describes this compound, which has Zn as a doubly charged cation? ZnO\u00e2\u201a\u201a Zn\u00e2\u201a\u0192O\u00e2\u201a\u201a ZnO ZnO ZnO<\/p>\n\n\n\n<p>T<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">he Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct formula for zinc oxide is <strong>ZnO<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>Zinc oxide is an <strong>ionic compound<\/strong> composed of zinc (Zn) and oxygen (O). To determine its chemical formula, we must consider the charges of the ions involved and ensure that the overall compound is electrically neutral.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. <strong>Zinc Ion (Zn\u00b2\u207a):<\/strong><\/h4>\n\n\n\n<p>Zinc is a metal found in Group 12 of the periodic table. It forms a stable <strong>Zn\u00b2\u207a ion<\/strong> by losing two electrons. This is a <strong>doubly charged cation<\/strong> (+2 charge), and it always has this oxidation state in ionic compounds.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. <strong>Oxide Ion (O\u00b2\u207b):<\/strong><\/h4>\n\n\n\n<p>Oxygen is a nonmetal and commonly forms the <strong>oxide ion (O\u00b2\u207b)<\/strong> when it gains two electrons. This is a <strong>doubly charged anion<\/strong> (\u22122 charge).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. <strong>Combining Ions:<\/strong><\/h4>\n\n\n\n<p>To form a neutral compound, the total positive charge must balance the total negative charge. Since Zn\u00b2\u207a and O\u00b2\u207b both carry equal but opposite charges, <strong>one ion of each is needed<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zn\u00b2\u207a + O\u00b2\u207b \u2192 ZnO<\/li>\n<\/ul>\n\n\n\n<p>Thus, the formula <strong>ZnO<\/strong> correctly represents zinc oxide, with the +2 charge from zinc balanced by the \u22122 charge from oxygen.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. <strong>Common Uses and Properties:<\/strong><\/h4>\n\n\n\n<p>Zinc oxide is a <strong>white, powdery substance<\/strong> that is <strong>insoluble in water<\/strong> but widely used in various products. It is a common ingredient in <strong>skin ointments, sunscreens, and diaper rash creams<\/strong> because it acts as a <strong>skin protectant<\/strong> and has <strong>antibacterial and anti-inflammatory properties<\/strong>. ZnO also reflects ultraviolet (UV) light, making it useful in sun protection.<\/p>\n\n\n\n<p>In addition to medical uses, ZnO is used in <strong>rubber manufacturing, ceramics, and as a pigment<\/strong> in paints. Its versatility comes from its stability, non-toxicity, and ability to block harmful radiation.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Conclusion:<\/strong><br>The formula for zinc oxide is <strong>ZnO<\/strong>, representing a 1:1 ratio of Zn\u00b2\u207a to O\u00b2\u207b, forming a neutral ionic compound.<\/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-banner7-396.jpeg\" alt=\"\" class=\"wp-image-232734\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Zinc oxide is found in ointments for the skin. What formula best describes this compound, which has Zn as a doubly charged cation? ZnO\u00e2\u201a\u201a Zn\u00e2\u201a\u0192O\u00e2\u201a\u201a ZnO ZnO ZnO The Correct Answer and Explanation is: The correct formula for zinc oxide is ZnO. Explanation: Zinc oxide is an ionic compound composed of zinc (Zn) and oxygen [&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-232733","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232733","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=232733"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232733\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=232733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=232733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=232733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}