{"id":3830,"date":"2023-01-09T10:37:41","date_gmt":"2023-01-09T10:37:41","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3830"},"modified":"2025-08-13T06:57:09","modified_gmt":"2025-08-13T06:57:09","slug":"s-5-a-acids-and-bases","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-5-a-acids-and-bases\/","title":{"rendered":"S-5.a Acids And Bases"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Acids and Bases<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/_rShwhRPk9I?si=gyILdlan6MCUnMPS&#038;rel=0\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\"><strong>Key Notes :<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>Understanding Acids and Bases:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Acids:<\/strong> Substances that release hydrogen ions (H\u207a) when dissolved in water. They taste sour and can turn blue litmus paper red. Examples include lemon juice and vinegar.<\/li>\n\n\n\n<li><strong>Bases:<\/strong> Substances that release hydroxide ions (OH\u207b) when dissolved in water. They taste bitter and can turn red litmus paper blue. Examples include baking soda and soap.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"423\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/6f3a1cdf-9b33-4b5f-b956-2a6620a4a8b6.png\" alt=\"\" class=\"wp-image-13666\" style=\"aspect-ratio:1.6548463356973995;width:430px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/6f3a1cdf-9b33-4b5f-b956-2a6620a4a8b6.png 700w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/6f3a1cdf-9b33-4b5f-b956-2a6620a4a8b6-300x181.png 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/figure><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>Properties of Acids:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Sour taste.<\/li>\n\n\n\n<li>Can conduct electricity in solution.<\/li>\n\n\n\n<li>React with metals to produce hydrogen gas.<\/li>\n\n\n\n<li>Examples: Citric acid in citrus fruits, acetic acid in vinegar.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>Properties of Bases:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Bitter taste.<\/li>\n\n\n\n<li>Slippery or soapy feel.<\/li>\n\n\n\n<li>Can conduct electricity in solution.<\/li>\n\n\n\n<li>Examples: Sodium hydroxide in drain cleaners, magnesium hydroxide in antacids.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>pH Scale:<\/strong><\/h3>\n\n\n\n<p class=\"has-large-font-size\"><strong>pH Scale:<\/strong> Measures how acidic or basic a substance is, ranging from 0 to 14.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>pH &lt; 7:<\/strong> Acidic.<\/li>\n\n\n\n<li><strong>pH = 7:<\/strong> Neutral (e.g., water).<\/li>\n\n\n\n<li><strong>pH &gt; 7:<\/strong> Basic (alkaline).<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"273\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-1.png\" alt=\"\" class=\"wp-image-13669\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-1.png 650w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-1-300x126.png 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>Indicators:<\/strong><\/h3>\n\n\n\n<p class=\"has-large-font-size\"><strong>Litmus Paper:<\/strong> Changes color to indicate acidity or basicity.<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Red Litmus Paper:<\/strong> Turns blue in a base, stays red in an acid.<\/li>\n\n\n\n<li><strong>Blue Litmus Paper:<\/strong> Turns red in an acid, stays blue in a base.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Universal Indicator:<\/strong> Changes color to show the pH level of a solution.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>Neutralization Reaction:<\/strong><\/h3>\n\n\n\n<p class=\"has-large-font-size\"><strong>Neutralization:<\/strong> A chemical reaction between an acid and a base that produces salt and water.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Example: Hydrochloric acid (HCl) + Sodium hydroxide (NaOH) \u2192 Sodium chloride (NaCl) + Water (H\u2082O).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>Safety:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Always handle acids and bases with care.<\/li>\n\n\n\n<li>Wear safety goggles and gloves.<\/li>\n\n\n\n<li>Follow proper procedures for dilution and disposal.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-large-font-size\" style=\"color:#000060\"><strong>Everyday Examples:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Acids:<\/strong> Citrus fruits, soda, and yogurt.<\/li>\n\n\n\n<li><strong>Bases:<\/strong> Toothpaste, baking soda, and ammonia.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/76678\/211\/791\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-21.png\" alt=\"\" class=\"wp-image-5903\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-21.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-21-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-21-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-21-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/58940\/502\/624\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-17.png\" alt=\"\" class=\"wp-image-5904\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-17.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-17-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-17-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-17-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Acids and Bases Key Notes : Understanding Acids and Bases: Properties of Acids: Properties of Bases: pH Scale: pH Scale: Measures how acidic or basic a substance is, ranging from 0 to 14. Indicators: Litmus Paper: Changes color to indicate acidity or basicity. Universal Indicator: Changes color to show the pH level of a solution.<a class=\"more-link\" href=\"https:\/\/7thclass.deltapublications.in\/index.php\/s-5-a-acids-and-bases\/\">Continue reading <span class=\"screen-reader-text\">&#8220;S-5.a Acids And Bases&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-3830","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3830","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3830"}],"version-history":[{"count":24,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3830\/revisions"}],"predecessor-version":[{"id":16716,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3830\/revisions\/16716"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}