{"id":5,"date":"2014-10-21T09:30:33","date_gmt":"2014-10-21T09:30:33","guid":{"rendered":"http:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/balancing-equations-revision-nat-5\/"},"modified":"2014-10-21T09:41:39","modified_gmt":"2014-10-21T09:41:39","slug":"balancing-equations-revision-nat-5","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/balancing-equations-revision-nat-5\/","title":{"rendered":"Balancing Equations (revision Nat 5)"},"content":{"rendered":"<p><strong>1. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>Find the values of a, b, c and d such that the following equation would be balanced:<\/p>\n<p><em>a<\/em>Al<sub>2<\/sub>S<sub>3\u00a0 <\/sub>\u00a0+\u00a0\u00a0 <em>b<\/em>H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0 \u2192\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <em>c<\/em>Al(OH)<sub>3<\/sub>\u00a0\u00a0 +\u00a0\u00a0 <em>d<\/em>H<sub>2<\/sub>S<\/p>\n<p><strong>2.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>Christian Schoenbein discovered ozone, O<sub>3<\/sub>, in 1839.<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ozone in air can be detected using paper strips that have been soaked in \u00a0\u00a0\u00a0\u00a0\u00a0 a mixture of starch and potassium iodide solution. The paper changes \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 colour when ozone is present.<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ozone reacts with potassium iodide and water to form iodine, oxygen \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 and potassium hydroxide.<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Write the balanced chemical equation for this reaction.<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>In many bathroom cleaning products, the bleaching agent is the \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 hypochlorite ion, ClO<sup>\u2013<\/sup>(aq).<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Hypochlorite bleaches can be made by reacting sodium hydroxide with \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 chlorine. Sodium hypochlorite, sodium chloride and water are formed.<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Write a balanced equation for the reaction.<\/p>\n<p><strong>4.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>Hydrogen has been named as a \u2018fuel for the future\u2019. In a recent article researchers reported success in making hydrogen from glycerol:<\/p>\n<p>C<sub>3<\/sub>H<sub>8<\/sub>O<sub>3<\/sub>(l) \u2192 CO<sub>2<\/sub>(g) + CH<sub>4<\/sub>(g) + H<sub>2<\/sub>(g)<\/p>\n<p>Balance this equation.<\/p>\n<p><strong>5.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>Methane is produced in the reaction of aluminium carbide with water.<\/p>\n<p>Al<sub>4<\/sub>C<sub>3<\/sub> + H<sub>2<\/sub>O \u2192 Al(OH)<sub>3<\/sub> + CH<sub>4<\/sub><\/p>\n<p>Balance the above equation.<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>6.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>Carbon monoxide can be produced in many ways.<\/p>\n<p>One method involves the reaction of carbon with an oxide of boron.<\/p>\n<p>B<sub>2<\/sub>O<sub>3 <\/sub>+ C \u2192 B<sub>4<\/sub>C + CO<\/p>\n<p>Balance this equation.<\/p>\n<p><strong>7.<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Nitrogen dioxide gas can be prepared in different ways.<\/p>\n<p>It is manufactured industrially as part of the Ostwald process. In the first stage of the process, nitrogen monoxide is produced by passing ammonia and oxygen over a platinum catalyst.<\/p>\n<p>NH<sub>3<\/sub>(g) + O<sub>2<\/sub>(g) \u2192 NO(g) + H<sub>2<\/sub>O(g)<\/p>\n<p>Balance the above equation.\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>8.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>When exploded, glycerol trinitrate decomposes to give nitrogen, water, \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 carbon dioxide and oxygen.<\/p>\n<p>Balance the equation for this reaction.<\/p>\n<p>C<sub>3<\/sub>H<sub>5<\/sub>N<sub>3<\/sub>O<sub>9<\/sub>(l) \u2192\u00a0\u00a0 N<sub>2<\/sub>(g)\u00a0\u00a0 +\u00a0\u00a0 H<sub>2<\/sub>O(g)\u00a0\u00a0 +\u00a0\u00a0 CO<sub>2<\/sub>(g)\u00a0\u00a0 +\u00a0\u00a0 O<sub>2<\/sub>(g)<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>9.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong>Acid-base reactions are common in chemistry.<\/p>\n<p>Write the balanced equation for the reaction between copper(I1) oxide \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 and nitric acid.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Find the values of a, b, c and d such that the following equation would be balanced: aAl2S3\u00a0 \u00a0+\u00a0\u00a0 bH2O\u00a0\u00a0\u00a0\u00a0\u00a0 \u2192\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cAl(OH)3\u00a0\u00a0 +\u00a0\u00a0 dH2S 2.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Christian Schoenbein discovered ozone, O3, in 1839. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ozone in air can be detected using paper strips that have been soaked in \u00a0\u00a0\u00a0\u00a0\u00a0 a mixture of starch and &hellip; <a href=\"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/balancing-equations-revision-nat-5\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Balancing Equations (revision Nat 5)&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-5","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages\/5","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/comments?post=5"}],"version-history":[{"count":2,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages\/5\/revisions"}],"predecessor-version":[{"id":25,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages\/5\/revisions\/25"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/media?parent=5"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}