{"id":138467,"date":"2024-09-15T07:41:19","date_gmt":"2024-09-15T07:41:19","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=138467"},"modified":"2024-09-15T07:41:21","modified_gmt":"2024-09-15T07:41:21","slug":"which-of-the-following-is-correct-regarding-the-ph-scale-2","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/09\/15\/which-of-the-following-is-correct-regarding-the-ph-scale-2\/","title":{"rendered":"Which of the following is correct regarding the pH scale"},"content":{"rendered":"\n<p>Which of the following is correct regarding the pH scale?<\/p>\n\n\n\n<p>A.<br>A substance with a pH of 3 is two times more alkaline than a substance with a pH of 4.<\/p>\n\n\n\n<p>B.<br>A substance with a pH of 3 is two times more acidic than a substance with a pH of 4.<\/p>\n\n\n\n<p>C.<br>A substance with a pH of 3 is 10 times more acidic than a substance with a pH of 4.<\/p>\n\n\n\n<p>D.<br>A substance with a pH of 3 is 10 times more alkaline than a substance with a pH of 4.<\/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>The correct answer is:<\/p>\n\n\n\n<p><strong>C. A substance with a pH of 3 is 10 times more acidic than a substance with a pH of 4.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The pH scale measures the acidity or alkalinity of a substance, with a range from 0 to 14. A pH of 7 is considered neutral, with values below 7 indicating acidity and values above 7 indicating alkalinity.<\/p>\n\n\n\n<p>The pH scale is logarithmic, meaning each whole number change on the scale represents a tenfold change in acidity or alkalinity. This means that a substance with a pH of 3 is ten times more acidic than a substance with a pH of 4.<\/p>\n\n\n\n<p>Here\u2019s a breakdown of why this is the case:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Logarithmic Nature of the pH Scale<\/strong>: The pH scale is based on the concentration of hydrogen ions (H\u207a) in a solution. The formula for pH is:<br>[<br>\\text{pH} = -\\log[\\text{H}^+]<br>]<br>This means that each unit change in pH represents a tenfold change in the concentration of hydrogen ions. For example, a pH of 3 means that the hydrogen ion concentration is (10^{-3}) M, while a pH of 4 means it is (10^{-4}) M.<\/li>\n\n\n\n<li><strong>Comparing pH 3 and pH 4<\/strong>: To determine how much more acidic one solution is compared to another, you calculate the ratio of their hydrogen ion concentrations. For pH 3 and pH 4:<br>[<br>\\text{Ratio} = \\frac{[\\text{H}^+]<em>{\\text{pH 3}}}{[\\text{H}^+]<\/em>{\\text{pH 4}}} = \\frac{10^{-3}}{10^{-4}} = 10<br>]<br>Therefore, a solution with a pH of 3 has ten times more hydrogen ions than a solution with a pH of 4, making it ten times more acidic.<\/li>\n\n\n\n<li><strong>Misconceptions<\/strong>: The other options are incorrect because they misinterpret the logarithmic nature of the pH scale. For instance, a pH of 3 is not two times more alkaline or two times more acidic than a pH of 4; the actual difference is tenfold.<\/li>\n<\/ol>\n\n\n\n<p>In summary, the pH scale\u2019s logarithmic nature means that a change of one unit corresponds to a tenfold difference in acidity or alkalinity. Thus, a substance with a pH of 3 is ten times more acidic than one with a pH of 4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following is correct regarding the pH scale? A.A substance with a pH of 3 is two times more alkaline than a substance with a pH of 4. B.A substance with a pH of 3 is two times more acidic than a substance with a pH of 4. C.A substance with a pH [&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-138467","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/138467","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=138467"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/138467\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=138467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=138467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=138467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}