{"id":199109,"date":"2025-03-10T18:25:38","date_gmt":"2025-03-10T18:25:38","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=199109"},"modified":"2025-03-10T18:25:41","modified_gmt":"2025-03-10T18:25:41","slug":"nano2-is-the-salt-of-strong-base-naoh-and-weak-acid-hno2","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/10\/nano2-is-the-salt-of-strong-base-naoh-and-weak-acid-hno2\/","title":{"rendered":"NaNO2 is the salt of strong base NaOH and weak acid HNO2"},"content":{"rendered":"\n

NaNO2 is the salt of strong base NaOH and weak acid HNO2, on hydrolysis NaNO2 + H2O –> HNO2 + NaOH since NaOH is a stronger base compare to weak acid HNO2. Hence the aqueous solution of NaNO2 shows basic. 2). HNO2 is a weak.<\/p>\n\n\n\n

The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer and Explanation:<\/h3>\n\n\n\n

Sodium nitrite (NaNO\u2082) is a salt formed from the strong base sodium hydroxide (NaOH) and the weak acid nitrous acid (HNO\u2082). When NaNO\u2082 dissolves in water, it undergoes hydrolysis, as follows: NaNO2+H2O\u21ccHNO2+NaOH\\text{NaNO}_2 + \\text{H}_2\\text{O} \\rightleftharpoons \\text{HNO}_2 + \\text{NaOH}<\/p>\n\n\n\n

Since NaOH is a strong base and HNO\u2082 is a weak acid, the solution becomes basic. The hydroxide ions (OH\u207b) released by NaOH dominate over the hydrogen ions (H\u207a) released by HNO\u2082, resulting in a pH greater than 7.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n
    \n
  1. Nature of the Components<\/strong>:\n
      \n
    • NaOH (Sodium Hydroxide)<\/strong>: A strong base that fully dissociates in water, producing Na\u207a and OH\u207b ions.<\/li>\n\n\n\n
    • HNO\u2082 (Nitrous Acid)<\/strong>: A weak acid that only partially dissociates, releasing a limited number of H\u207a ions.<\/li>\n\n\n\n
    • NaNO\u2082 (Sodium Nitrite)<\/strong>: The salt of a strong base (NaOH) and a weak acid (HNO\u2082).<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Hydrolysis of Sodium Nitrite<\/strong>:
      • When NaNO\u2082 dissolves in water, it dissociates into sodium ions (Na\u207a) and nitrite ions (NO\u2082\u207b).<\/li>
      • The Na\u207a ion does not undergo hydrolysis, as it is a spectator ion.<\/li>
      • The NO\u2082\u207b ion, derived from the weak acid HNO\u2082, reacts with water to form OH\u207b ions:<\/li><\/ul>NO2\u2212+H2O\u21ccHNO2+OH\u2212\\text{NO}_2^- + \\text{H}_2\\text{O} \\rightleftharpoons \\text{HNO}_2 + \\text{OH}^- This reaction generates OH\u207b ions, making the solution basic.<\/li>\n\n\n\n
      • Effect on pH<\/strong>:\n
          \n
        • Since OH\u207b ions increase in the solution, the pH of NaNO\u2082 solution is greater than 7.<\/li>\n\n\n\n
        • The presence of excess hydroxide ions confirms the basic nature of the solution.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
        • Conclusion<\/strong>:\n
            \n
          • Since the base NaOH is stronger than the acid HNO\u2082, the hydrolysis of NaNO\u2082 results in a basic solution<\/strong>.<\/li>\n\n\n\n
          • This is a classic example of how the salt of a strong base and a weak acid produces a basic solution upon hydrolysis.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
          • <\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

            NaNO2 is the salt of strong base NaOH and weak acid HNO2, on hydrolysis NaNO2 + H2O –> HNO2 + NaOH since NaOH is a stronger base compare to weak acid HNO2. Hence the aqueous solution of NaNO2 shows basic. 2). HNO2 is a weak. The correct answer and explanation is: Correct Answer and Explanation: […]<\/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-199109","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199109","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=199109"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199109\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=199109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=199109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=199109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}