{"id":2390,"date":"2025-05-12T18:26:30","date_gmt":"2025-05-12T12:56:30","guid":{"rendered":"https:\/\/leverageedu.com\/questions-answers\/?p=2390"},"modified":"2025-05-12T18:26:33","modified_gmt":"2025-05-12T12:56:33","slug":"is-calcium-hydroxide-a-weak-alkali-class-11-chemistry-cbse","status":"publish","type":"post","link":"https:\/\/leverageedu.com\/questions-answers\/is-calcium-hydroxide-a-weak-alkali-class-11-chemistry-cbse\/","title":{"rendered":"Is Calcium Hydroxide a weak alkali?"},"content":{"rendered":"\n<p><strong>Answer:<\/strong> No, calcium hydroxide is not a weak alkali. Although it is only slightly soluble in water, the solution it forms fully ionises, which makes it less concentrated than strong alkalis like sodium hydroxide or potassium hydroxide, but chemically still a strong base.<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Complete Answer:<\/strong><\/p>\n\n\n\n<p>Calcium hydroxide is a strong base because it ionises completely in water and breaks down into Ca\u00b2\u207a (calcium ions) and OH\u207b (hydroxide ions). However, it is not very soluble in water. This means only a small amount of it dissolves, but the part that does dissolve ionises completely. This is why it can sometimes be mistaken for a weak alkali, but chemically, it is a strong base.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The pH of a saturated calcium hydroxide solution is around 12.4, which indicates its strong basic nature.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Calcium hydroxide has a high pKb (base dissociation constant), which reflects that it easily gives off hydroxide ions.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It is classified as a strong Arrhenius base, showing its contribution to OH\u207b concentration when dissolved.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"640\" src=\"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/12165025\/Solubility-and-Strength-of-Calcium-Hydroxide-1.webp\" alt=\"Solubility and Strength of Calcium Hydroxide\" class=\"wp-image-2396\" srcset=\"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/12165025\/Solubility-and-Strength-of-Calcium-Hydroxide-1.webp 1024w, https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/12165025\/Solubility-and-Strength-of-Calcium-Hydroxide-1-300x188.webp 300w, https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/12165025\/Solubility-and-Strength-of-Calcium-Hydroxide-1-768x480.webp 768w, https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/12165025\/Solubility-and-Strength-of-Calcium-Hydroxide-1-380x238.webp 380w, https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/12165025\/Solubility-and-Strength-of-Calcium-Hydroxide-1-800x500.webp 800w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Facts to Remember about Calcium Hydroxide:<\/strong><\/p>\n\n\n\n<div class=\"wp-block-group has-background\" style=\"background-color:#e9ecf04f\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<ul class=\"wp-block-list\">\n<li>Calcium hydroxide is a strong base used in whitewashing walls and neutralising acidic soils.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It is part of the strong bases called alkaline earth metal hydroxides.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Complete ionisation of calcium hydroxide means that it can easily deprotonate weak acids and raise pH effectively.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>Thus, calcium hydroxide is not a weak alkali; instead, it is a strong base with low solubility. Once it is dissolved, it behaves powerfully and reflects its chemical strength, even if it appears mild at first glance.<\/p>\n\n\n\n<p class=\"has-text-align-center has-medium-font-size\"><strong>Common Chemistry Doubts:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\" style=\"font-size:18px\"><table class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background has-fixed-layout\"><tbody><tr><td><a href=\"https:\/\/leverageedu.com\/questions-answers\/how-does-a-schiff-reagent-react-with-an-aldehyde-class-11-chemistry-cbse\/\"><strong>How does a Schiff reagent react with an aldehyde?<\/strong><\/a><\/td><td><a href=\"https:\/\/leverageedu.com\/questions-answers\/write-the-atomicity-of-the-following-sulphur-phosphorus-class-11-chemistry-cbse\/\"><strong>Write the Atomicity of the Following: (i) Sulphur (ii) Phosphorus<\/strong><\/a><\/td><\/tr><tr><td><a href=\"https:\/\/leverageedu.com\/questions-answers\/functionally-active-form-of-vitamin-d-is-class-11-chemistry-cbse\/\"><strong>Functionally active form of vitamin D is<\/strong><\/a><\/td><td><a href=\"https:\/\/leverageedu.com\/questions-answers\/who-is-the-father-of-physical-chemistry\/\"><strong>Who is the Father of Physical Chemistry?<\/strong><\/a><\/td><\/tr><tr><td><a href=\"https:\/\/leverageedu.com\/questions-answers\/distilled-water-is-a-good-conductor-of-electricity-class-10-chemistry-cbse\/\"><strong>Distilled Water is a Good Conductor of Electricity<\/strong><\/a><\/td><td><a href=\"https:\/\/leverageedu.com\/questions-answers\/distinguish-between-esterification-and-saponification-reactions\/\"><strong>Distinguish between esterification and saponification reactions of organic compounds<\/strong><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"Answer: No, calcium hydroxide is not a weak alkali. Although it is only slightly soluble in water, the&hellip;\n","protected":false},"author":114,"featured_media":2394,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"editor_notices":[],"footnotes":""},"categories":[10,4],"tags":[],"class_list":{"0":"post-2390","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-chemistry","8":"category-science"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Is Calcium Hydroxide a weak alkali?<\/title>\n<meta name=\"description\" content=\"Is Calcium Hydroxide a weak alkali? 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