Correct Answer:<\/strong><\/p>\n\n\n\n Zinc reacts more slowly with dilute hydrochloric acid than with concentrated hydrochloric acid because the rate of a chemical reaction is directly dependent on the concentration of the reactants. Concentrated acid has a higher number of reactant particles per unit volume, leading to more frequent and effective collisions with the zinc surface.<\/p>\n\n\n\n The reaction between zinc metal and hydrochloric acid is a single displacement reaction where zinc displaces hydrogen to form zinc chloride and hydrogen gas. The balanced chemical equation for this reaction is:<\/p>\n\n\n\n The speed, or rate, at which this reaction occurs is governed by Collision Theory<\/strong>. This theory states that for a reaction to take place, the reactant particles (in this case, zinc atoms and hydrogen ions, <\/p>\n\n\n\n , from the acid) must collide with each other with sufficient energy and in the correct orientation.<\/p>\n\n\n\n The Role of Concentration:<\/strong> In summary, the higher the concentration of hydrochloric acid, the greater the number of reacting particles, which increases the frequency of effective collisions and, therefore, accelerates the rate of the reaction.<\/p>\n\n\n\n Explain why zn reacts more slowly with dilute hydrochloric acid then with concentrated hydrochloric acid The Correct Answer and Explanation is: Correct Answer: Zinc reacts more slowly with dilute hydrochloric acid than with concentrated hydrochloric acid because the rate of a chemical reaction is directly dependent on the concentration of the reactants. Concentrated acid has […]<\/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-231190","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/231190","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=231190"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/231190\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=231190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=231190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=231190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation<\/h3>\n\n\n\n
Zn(s)+2HCl(aq)\u2192ZnCl2(aq)+H2(g)Z<\/em>n<\/em>(s<\/em>)+2H<\/em>Cl<\/em>(a<\/em>q<\/em>)\u2192Z<\/em>n<\/em>C<\/em>l<\/em>2\u200b(a<\/em>q<\/em>)+H<\/em>2\u200b(g<\/em>)<\/code><\/pre>\n\n\n\nH+H<\/em>+<\/code><\/pre>\n\n\n\n
The concentration of an acid refers to the number of acid molecules (or ions) dissolved in a specific volume of water.<\/p>\n\n\n\n\n
H+H<\/em>+<\/code>) packed into a given volume. Because of this high density of ions, there is a much greater probability of\u00a0H+H<\/em>+<\/code>\u00a0ions colliding with the surface of the zinc metal at any moment. This increase in the\u00a0frequency of collisions<\/em>\u00a0leads to a higher number of\u00a0effective collisions<\/em>\u2014those that have enough energy to result in a reaction. Consequently, the rate of hydrogen gas production is high, and the zinc dissolves quickly. This is observed as vigorous bubbling (effervescence).<\/li>\n\n\n\nH+H<\/em>+<\/code>) per unit volume. With fewer reactant ions available in the same space, the frequency of collisions between the\u00a0H+H<\/em>+<\/code>\u00a0ions and the zinc atoms is significantly reduced. As a result, there are fewer effective collisions per unit of time, and the reaction proceeds at a much slower pace. The observed effervescence will be gentle and less rapid.<\/li>\n<\/ol>\n\n\n\n![\"\"](\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner4-851.jpeg\")
<\/figure>\n","protected":false},"excerpt":{"rendered":"