{"id":234432,"date":"2025-06-14T06:17:15","date_gmt":"2025-06-14T06:17:15","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=234432"},"modified":"2025-06-14T06:17:17","modified_gmt":"2025-06-14T06:17:17","slug":"al-o2-al2o3-balance-the-chemical-equation","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/14\/al-o2-al2o3-balance-the-chemical-equation\/","title":{"rendered":"Al + O2 —> Al2O3 Balance the chemical equation."},"content":{"rendered":"\n

Al + O2 —> Al2O3 Balance the chemical equation.<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

To balance the chemical equation:<\/p>\n\n\n\n

Unbalanced Equation:<\/strong>
Al + O\u2082 \u2192 Al\u2082O\u2083<\/p>\n\n\n\n

\n\n\n\n

Balanced Chemical Equation:<\/strong><\/h3>\n\n\n\n

4Al + 3O\u2082 \u2192 2Al\u2082O\u2083<\/strong><\/p>\n\n\n\n

\n\n\n\n

Explanation<\/strong><\/h3>\n\n\n\n

Balancing chemical equations is a fundamental skill in chemistry. It ensures that the Law of Conservation of Mass is upheld, meaning the same number of each type of atom must appear on both sides of the equation. Let us analyze and balance the reaction of aluminum (Al) with oxygen gas (O\u2082) to form aluminum oxide (Al\u2082O\u2083).<\/p>\n\n\n\n

Begin by writing the unbalanced equation:<\/p>\n\n\n\n

Al + O\u2082 \u2192 Al\u2082O\u2083<\/strong><\/p>\n\n\n\n

Examine the number of atoms for each element on both sides:<\/p>\n\n\n\n

    \n
  • Left side (reactants):<\/strong>\n
      \n
    • Al: 1 atom<\/li>\n\n\n\n
    • O: 2 atoms (because O\u2082 is a diatomic molecule)<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Right side (products):<\/strong>\n
        \n
      • Al: 2 atoms (in Al\u2082O\u2083)<\/li>\n\n\n\n
      • O: 3 atoms (in Al\u2082O\u2083)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

        At this point, the number of aluminum and oxygen atoms does not match on both sides. Start by balancing the aluminum atoms. Since there are 2 Al atoms<\/strong> in Al\u2082O\u2083, place a 4<\/strong> in front of Al on the left to make 4 Al atoms, which will correspond to 2 molecules of Al\u2082O\u2083 on the right (because 2 \u00d7 2 = 4):<\/p>\n\n\n\n

        4Al + O\u2082 \u2192 2Al\u2082O\u2083<\/strong><\/p>\n\n\n\n

        Now balance the oxygen atoms. The right side now has 2 \u00d7 3 = 6 oxygen atoms<\/strong>. Since each O\u2082 molecule has 2 oxygen atoms, to get 6 oxygen atoms, place a 3<\/strong> in front of O\u2082:<\/p>\n\n\n\n

        4Al + 3O\u2082 \u2192 2Al\u2082O\u2083<\/strong><\/p>\n\n\n\n

        Now both sides have:<\/p>\n\n\n\n

          \n
        • 4 aluminum atoms<\/strong><\/li>\n\n\n\n
        • 6 oxygen atoms<\/strong><\/li>\n<\/ul>\n\n\n\n

          The equation is now balanced. This means that four aluminum atoms react with three oxygen molecules to produce two formula units of aluminum oxide. This balanced equation respects the conservation of mass, making it chemically accurate.<\/p>\n\n\n\n

          \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

          Al + O2 —> Al2O3 Balance the chemical equation. The Correct Answer and Explanation is: To balance the chemical equation: Unbalanced Equation:Al + O\u2082 \u2192 Al\u2082O\u2083 Balanced Chemical Equation: 4Al + 3O\u2082 \u2192 2Al\u2082O\u2083 Explanation Balancing chemical equations is a fundamental skill in chemistry. It ensures that the Law of Conservation of Mass is upheld, […]<\/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-234432","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234432","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=234432"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234432\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=234432"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=234432"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=234432"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}