Which of the following would result in an increase in the rate of a chemical reaction?<\/p>\n\n\n\n
A.
Using a mortar and pestle to grind a solid reactant to a powder<\/p>\n\n\n\n
B.
Decreasing the concentration of the reactant<\/p>\n\n\n\n
C.
Adding more of the product<\/p>\n\n\n\n
D.
Sealing the reaction in an airtight container<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n The correct answer is A. Using a mortar and pestle to grind a solid reactant to a powder<\/strong>.<\/p>\n\n\n\n Explanation:<\/strong><\/p>\n\n\n\n The rate of a chemical reaction is influenced by several factors, including surface area, concentration, temperature, and the presence of catalysts. Let’s examine how each option affects the rate of a chemical reaction:<\/p>\n\n\n\n A. Using a mortar and pestle to grind a solid reactant to a powder<\/strong><\/p>\n\n\n\n Grinding a solid reactant into a powder increases its surface area. In chemical reactions involving solid reactants, the reaction occurs at the surface of the solid. By increasing the surface area, more reactant particles are exposed to react with other reactants. This leads to a higher frequency of collisions between reactant molecules or ions, which increases the rate of the reaction. For instance, powdered calcium carbonate reacts more quickly with hydrochloric acid than large chunks of calcium carbonate because the powdered form has a greater surface area for the reaction to occur.<\/p>\n\n\n\n B. Decreasing the concentration of the reactant<\/strong><\/p>\n\n\n\n Decreasing the concentration of reactants actually slows down the reaction rate. Concentration refers to the amount of reactant present in a given volume. A lower concentration means fewer reactant particles are present, leading to fewer collisions between them and thus a slower reaction rate. For example, if the concentration of hydrogen peroxide is reduced, the decomposition reaction will proceed more slowly.<\/p>\n\n\n\n C. Adding more of the product<\/strong><\/p>\n\n\n\n Adding more of the product typically does not increase the rate of a reaction and can sometimes shift the equilibrium position if the reaction is reversible. According to Le Chatelier’s principle, increasing the concentration of products can shift the equilibrium position to favor the reactants, thereby reducing the rate of the forward reaction.<\/p>\n\n\n\n D. Sealing the reaction in an airtight container<\/strong><\/p>\n\n\n\n Sealing the reaction in an airtight container can affect the rate of reaction depending on the nature of the reaction. For reactions that produce gases, sealing the container can cause pressure to build up, which might influence the reaction rate. However, for many reactions, sealing the container may not significantly impact the rate if the reactants and products are in a liquid or solid state. The rate of reaction is more directly influenced by factors like concentration, temperature, and surface area rather than containment alone.<\/p>\n\n\n\n In summary, increasing the surface area of a solid reactant by grinding it into a powder is an effective way to enhance the rate of a chemical reaction.<\/p>\n","protected":false},"excerpt":{"rendered":" Which of the following would result in an increase in the rate of a chemical reaction? A.Using a mortar and pestle to grind a solid reactant to a powder B.Decreasing the concentration of the reactant C.Adding more of the product D.Sealing the reaction in an airtight container The Correct Answer and Explanation is: The correct […]<\/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-136152","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/136152","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=136152"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/136152\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=136152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=136152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=136152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}