{"id":39,"date":"2024-10-24T12:28:19","date_gmt":"2024-10-24T16:28:19","guid":{"rendered":"https:\/\/sites.temple.edu\/chemdemo\/?p=39"},"modified":"2024-10-25T16:22:14","modified_gmt":"2024-10-25T20:22:14","slug":"ammonium-chloride-ring","status":"publish","type":"post","link":"https:\/\/sites.temple.edu\/chemdemo\/2024\/10\/24\/ammonium-chloride-ring\/","title":{"rendered":"Ammonium Chloride Ring"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Purpose<\/h2>\n\n\n\n<p>To demonstrate that heavier molecules move more slowly at a given temperature by comparing the diffusion rates of hydrochloric acid (HCl) and ammonia (NH\u2083). Refer to Shakashiri 5.6 for more information. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Materials<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Apparatus for measuring the speed of smell<\/li>\n\n\n\n<li>Ammonia (e.g., Windex)<\/li>\n\n\n\n<li>Hydrochloric acid<\/li>\n\n\n\n<li>Black background for visibility<\/li>\n\n\n\n<li>Cotton balls (wrung out)<\/li>\n\n\n\n<li>Indicator paper (optional)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Procedure<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Equipment Introduction:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Introduce the apparatus as a device to measure the speed of smell.<\/li>\n\n\n\n<li>Explain the experiment&#8217;s purpose, emphasizing that Graham\u2019s law of effusion is not applicable here.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Chemical Smells:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Introduce ammonia as the smell of Windex and hydrochloric acid as resembling vomit (relatable for students in dorms).<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Observation:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wait for the ammonium chloride ring to form in the apparatus.<\/li>\n\n\n\n<li>Ensure a black background is used for optimal visibility of the ring.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Improving Visibility:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>While indicator paper can enhance visibility, it may interfere with the diffusion ratio. Use wrung-out cotton balls instead to avoid liquid running along the edges.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>This experiment effectively illustrates the concept of molecular weight and diffusion rates, demonstrating that heavier molecules, such as HCl, diffuse more slowly than lighter molecules like NH\u2083.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Purpose To demonstrate that heavier molecules move more slowly at a given temperature by comparing the diffusion rates of hydrochloric acid (HCl) and ammonia (NH\u2083).&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/sites.temple.edu\/chemdemo\/2024\/10\/24\/ammonium-chloride-ring\/\">Continue Reading<span class=\"screen-reader-text\">Ammonium Chloride Ring<\/span><\/a><\/div>\n","protected":false},"author":36673,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-39","post","type-post","status-publish","format-standard","hentry","category-demonstrations","entry"],"_links":{"self":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts\/39","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/users\/36673"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/comments?post=39"}],"version-history":[{"count":1,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts\/39\/revisions"}],"predecessor-version":[{"id":40,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts\/39\/revisions\/40"}],"wp:attachment":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/media?parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/categories?post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/tags?post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}