{"id":194175,"date":"2025-02-23T05:53:30","date_gmt":"2025-02-23T05:53:30","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=194175"},"modified":"2025-02-23T05:53:33","modified_gmt":"2025-02-23T05:53:33","slug":"find-actual-theoretical-and-yields-of-cis-4-cyclohexene-12-dicarboxylic-anhydride-mw-152-149-g-mol-from-diels-alder-reaction","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/23\/find-actual-theoretical-and-yields-of-cis-4-cyclohexene-12-dicarboxylic-anhydride-mw-152-149-g-mol-from-diels-alder-reaction\/","title":{"rendered":"Find actual, theoretical, and % yields of cis-4-cyclohexene-1,2-dicarboxylic anhydride (mw: 152.149 g\/mol) from diels alder reaction"},"content":{"rendered":"\n<p>Find actual, theoretical, and % yields of cis-4-cyclohexene-1,2-dicarboxylic anhydride (mw: 152.149 g\/mol) from diels alder reaction, with 0.261g of 2.2 mmol of 3-sulfolene (mw: 118.15 g\/mol) and 0.099 g of 1.0 mmol maleic acid (mw: 116.1 g\/mol). After recrystallization, the recovered crystals mass was 0.263 g<\/p>\n\n\n\n<p>Am I calculating something wrong? I am getting a % yield of 173%.<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>Let&#8217;s go through the calculations to verify your results and determine the actual, theoretical, and percentage yields for the production of cis-4-cyclohexene-1,2-dicarboxylic anhydride through a Diels-Alder reaction.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Theoretical Yield Calculation<\/h3>\n\n\n\n<p>First, we need to identify the limiting reactant for this reaction:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>3-Sulfolene<\/strong>: You provided 0.261 g, which corresponds to 2.2 mmol (since the molar mass is 118.15 g\/mol).<\/li>\n\n\n\n<li><strong>Maleic anhydride<\/strong>: You provided 0.099 g, which corresponds to 1.0 mmol (since the molar mass is 116.1 g\/mol).<\/li>\n<\/ul>\n\n\n\n<p>Since maleic anhydride is the limiting reactant with only 1.0 mmol available, we&#8217;ll use this for our yield calculation.<\/p>\n\n\n\n<p>In the Diels-Alder reaction, the stoichiometry typically follows a 1:1 ratio. Thus, every mole of maleic anhydride should theoretically react to form one mole of cis-4-cyclohexene-1,2-dicarboxylic anhydride.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Molar mass of product (cis-4-cyclohexene-1,2-dicarboxylic anhydride)<\/strong>: 152.149 g\/mol<\/li>\n\n\n\n<li><strong>Theoretical yield<\/strong>: ( 1.0 \\, \\text{mmol} \\times 152.149 \\, \\text{g\/mol} = 0.152 \\, \\text{g} )<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Actual Yield<\/h3>\n\n\n\n<p>The mass of recovered crystals after recrystallization is 0.263 g.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Percent Yield Calculation<\/h3>\n\n\n\n<p>The percent yield can be calculated as follows:<br>[ \\text{Percent Yield} = \\left( \\frac{\\text{Actual Yield}}{\\text{Theoretical Yield}} \\right) \\times 100\\% ]<\/p>\n\n\n\n<p>Plugging in the numbers:<br>[ \\text{Percent Yield} = \\left( \\frac{0.263 \\, \\text{g}}{0.152 \\, \\text{g}} \\right) \\times 100\\% = 173.03\\% ]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<p>The result of over 100% yield is unusual and typically indicates an error or contamination in the experiment. Here are a few possibilities:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Excess Starting Material<\/strong>: It&#8217;s possible that not all of the 3-sulfolene was consumed, and remnants were carried through to the final product, falsely increasing the mass.<\/li>\n\n\n\n<li><strong>Impurities<\/strong>: The final product may contain impurities that were not removed during the recrystallization process. These could include unreacted starting materials, byproducts, or solvents.<\/li>\n\n\n\n<li><strong>Measurement Errors<\/strong>: Errors in measuring the weights of the reactants or product can lead to incorrect yield calculations.<\/li>\n<\/ol>\n\n\n\n<p>To address these issues:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Purification<\/strong>: Ensure thorough purification and confirm the purity of the product using appropriate analytical techniques such as TLC, NMR, or mass spectrometry.<\/li>\n\n\n\n<li><strong>Repeat Experiments<\/strong>: Performing the experiment multiple times can help ensure the accuracy of the measurements and consistency of the procedure.<\/li>\n<\/ul>\n\n\n\n<p>In summary, a yield greater than 100% prompts a review of experimental procedures, starting material purity, and measurement accuracy to identify the source of the error.<\/p>\n\n\n\n<p>Now, let&#8217;s create the image representing this Diels-Alder reaction and the crystallization of the product.<\/p>\n\n\n\n<p>Here is the illustration of the Diels-Alder reaction between 3-sulfolene and maleic anhydride forming cis-4-cyclohexene-1,2-dicarboxylic anhydride, including the recovery of crystals through recrystallization. The image depicts the chemical structures, reaction flow, and stages of the process clearly.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/02\/image-1246.png\" alt=\"\" class=\"wp-image-194176\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Find actual, theoretical, and % yields of cis-4-cyclohexene-1,2-dicarboxylic anhydride (mw: 152.149 g\/mol) from diels alder reaction, with 0.261g of 2.2 mmol of 3-sulfolene (mw: 118.15 g\/mol) and 0.099 g of 1.0 mmol maleic acid (mw: 116.1 g\/mol). After recrystallization, the recovered crystals mass was 0.263 g Am I calculating something wrong? I am getting a [&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-194175","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194175","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=194175"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194175\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=194175"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=194175"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=194175"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}