REPORT SHEET LAB: Chemical Reactions and Equations 10. Magnesium and Oxygen 1. Initial appearance of Mg: shiny silver 2. Evidence of chemical reaction: The Mg ignited and turned into a grayish-white powder. 3. Balance: Mg(s) + O2(g) \u00e2\u2020\u2019 MgO(s) 4. Type of chemical reaction: Combustion Zinc and Copper(II) Sulfate Time CuSO4(aq) + Zn(s) Appearance Evidence of a Chemical Reaction Appearance 1. Initial: Blue solution 2. After reaction: Black precipitate 30 min Zn(s) + CuSO4(aq) \u00e2\u2020\u2019 Cu(s) + ZnSO4(aq) Type of chemical reaction: Single displacement<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n
REPORT SHEET LAB: Chemical Reactions and Equations 10<\/strong><\/h3>\n\n\n\n
Magnesium and Oxygen<\/strong><\/p>\n\n\n\n\n
Initial appearance of Mg:<\/strong> Shiny silver<\/li>\n\n\n\n
Evidence of chemical reaction:<\/strong> The magnesium ignited with a bright white flame and formed a grayish-white powder.<\/li>\n\n\n\n
Balanced chemical equation:<\/strong> 2Mg(s) + O\u2082(g) \u2192 2MgO(s)<\/strong><\/li>\n\n\n\n
Type of chemical reaction:<\/strong> Combustion<\/strong> (also a Combination\/Synthesis<\/strong> reaction)<\/li>\n<\/ol>\n\n\n\n\n\n\n\n
Zinc and Copper(II) Sulfate<\/strong><\/p>\n\n\n\n\n
Initial appearance of solution:<\/strong> Blue solution (due to Cu\u00b2\u207a ions)<\/li>\n\n\n\n
Evidence of a chemical reaction:<\/strong> The blue color faded, a reddish-brown solid (copper) formed, and the zinc became dull.<\/li>\n\n\n\n
Balanced chemical equation:<\/strong> Zn(s) + CuSO\u2084(aq) \u2192 Cu(s) + ZnSO\u2084(aq)<\/strong><\/li>\n\n\n\n
Type of chemical reaction:<\/strong> Single Displacement<\/strong><\/li>\n<\/ol>\n\n\n\n\n\n\n\n
Explanation<\/strong><\/h3>\n\n\n\n
This lab demonstrates two important types of chemical reactions: combustion and single displacement. In the first reaction, magnesium (Mg) is a shiny, silver metal. When heated in the presence of oxygen (O\u2082), it combusts, producing a bright white flame. This reaction forms magnesium oxide (MgO), a white or grayish powder. The balanced chemical equation is: 2Mg(s) + O\u2082(g) \u2192 2MgO(s)<\/strong>. This is classified as a combustion<\/strong> reaction because it involves a substance reacting with oxygen, releasing energy as light and heat. It is also a synthesis<\/strong> reaction, where two reactants combine to form a single product.<\/p>\n\n\n\n
In the second reaction, solid zinc (Zn) is placed in an aqueous solution of copper(II) sulfate (CuSO\u2084), which is blue due to dissolved Cu\u00b2\u207a ions. Over time, zinc displaces the copper from the solution. This is evident when the blue color fades and a reddish-brown solid (copper metal) forms on the zinc surface. The balanced equation is: Zn(s) + CuSO\u2084(aq) \u2192 Cu(s) + ZnSO\u2084(aq)<\/strong>. This is a single displacement<\/strong> reaction because a more reactive metal (zinc) displaces a less reactive metal (copper) from its compound. The zinc goes into solution as Zn\u00b2\u207a, forming zinc sulfate (ZnSO\u2084), while copper is deposited as a solid.<\/p>\n\n\n\n
These reactions show how observable changes\u2014color changes, formation of solids, and light or heat emission\u2014indicate chemical changes, confirming the transformation of substances into new products with different properties.<\/p>\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"
REPORT SHEET LAB: Chemical Reactions and Equations 10. Magnesium and Oxygen 1. Initial appearance of Mg: shiny silver 2. Evidence of chemical reaction: The Mg ignited and turned into a grayish-white powder. 3. Balance: Mg(s) + O2(g) \u00e2\u2020\u2019 MgO(s) 4. Type of chemical reaction: Combustion Zinc and Copper(II) Sulfate Time CuSO4(aq) + Zn(s) Appearance Evidence […]<\/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-224867","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/224867","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=224867"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/224867\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=224867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=224867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=224867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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