{"id":182174,"date":"2025-01-13T13:14:47","date_gmt":"2025-01-13T13:14:47","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=182174"},"modified":"2025-01-13T13:14:49","modified_gmt":"2025-01-13T13:14:49","slug":"the-weight-of-the-dibenzalacetone-crystals-was-0-150-grams","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/13\/the-weight-of-the-dibenzalacetone-crystals-was-0-150-grams\/","title":{"rendered":"The weight of the dibenzalacetone crystals was 0.150 grams"},"content":{"rendered":"\n<p>The weight of the dibenzalacetone crystals was 0.150 grams. The melting point for the dibenzalacetone crystals was 108-110 degrees Celcius. Determine the adjusted stoichiometry and the limitimg reagent. Then determine the theoretical yeild and the percent yeild.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/01\/image-150-714x1024.png\" alt=\"\" class=\"wp-image-182175\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/01\/image-151-857x1024.png\" alt=\"\" class=\"wp-image-182176\"\/><\/figure>\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>Dibenzalacetone is synthesized through an aldol condensation reaction between benzaldehyde and acetone. In this reaction, two moles of benzaldehyde react with one mole of acetone to form dibenzalacetone. The balanced chemical equation is:<\/p>\n\n\n\n<p>[ 2 \\, \\text{C}_6\\text{H}_5\\text{CHO} + \\text{CH}_3\\text{COCH}_3 \\rightarrow \\text{C}_6\\text{H}_5\\text{CH}=\\text{CH}\\text{COCH}=\\text{CH}\\text{C}_6\\text{H}_5 ]<\/p>\n\n\n\n<p><strong>Determining the Limiting Reagent:<\/strong><\/p>\n\n\n\n<p>To identify the limiting reagent, we need to calculate the moles of each reactant used:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Benzaldehyde (C\u2086H\u2085CHO):<\/strong><\/li>\n\n\n\n<li>Molar mass = 106.13 g\/mol<\/li>\n\n\n\n<li>Mass used = 0.82 g<\/li>\n\n\n\n<li>Moles = 0.82 g \u00f7 106.13 g\/mol \u2248 0.00772 mol<\/li>\n\n\n\n<li><strong>Acetone (CH\u2083COCH\u2083):<\/strong><\/li>\n\n\n\n<li>Molar mass = 58.08 g\/mol<\/li>\n\n\n\n<li>Mass used = 0.24 g<\/li>\n\n\n\n<li>Moles = 0.24 g \u00f7 58.08 g\/mol \u2248 0.00413 mol<\/li>\n<\/ul>\n\n\n\n<p>According to the stoichiometry of the reaction, two moles of benzaldehyde react with one mole of acetone. Therefore, for 0.00413 mol of acetone, 0.00826 mol of benzaldehyde is required. Since only 0.00772 mol of benzaldehyde is available, benzaldehyde is the limiting reagent.<\/p>\n\n\n\n<p><strong>Calculating the Theoretical Yield:<\/strong><\/p>\n\n\n\n<p>The theoretical yield is determined by the amount of product that can be formed from the limiting reagent. Since the molar ratio of benzaldehyde to dibenzalacetone is 2:1, 0.00772 mol of benzaldehyde will produce 0.00386 mol of dibenzalacetone.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Molar mass of dibenzalacetone = 234 g\/mol<\/li>\n\n\n\n<li>Theoretical yield = 0.00386 mol \u00d7 234 g\/mol \u2248 0.905 g<\/li>\n<\/ul>\n\n\n\n<p><strong>Calculating the Percent Yield:<\/strong><\/p>\n\n\n\n<p>The percent yield is calculated by dividing the actual yield by the theoretical yield and multiplying by 100:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Actual yield = 0.150 g<\/li>\n\n\n\n<li>Percent yield = (0.150 g \u00f7 0.905 g) \u00d7 100 \u2248 16.6%<\/li>\n<\/ul>\n\n\n\n<p><strong>Conclusion:<\/strong><\/p>\n\n\n\n<p>In this experiment, benzaldehyde is the limiting reagent, and the theoretical yield of dibenzalacetone is approximately 0.905 g. The actual yield obtained is 0.150 g, resulting in a percent yield of about 16.6%. This relatively low yield may be attributed to factors such as incomplete reactions, losses during product isolation, or impurities in the reagents.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The weight of the dibenzalacetone crystals was 0.150 grams. The melting point for the dibenzalacetone crystals was 108-110 degrees Celcius. Determine the adjusted stoichiometry and the limitimg reagent. Then determine the theoretical yeild and the percent yeild. The Correct Answer and Explanation is : Dibenzalacetone is synthesized through an aldol condensation reaction between benzaldehyde and [&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-182174","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/182174","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=182174"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/182174\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=182174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=182174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=182174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}