{"id":238637,"date":"2025-06-18T09:16:13","date_gmt":"2025-06-18T09:16:13","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=238637"},"modified":"2025-06-18T09:16:15","modified_gmt":"2025-06-18T09:16:15","slug":"rank-the-following-compounds-in-order-of-decreasing-acidity-based-upon-the-ka-value-with-being-the-strongest-acid-and-being-the-weakest-acid","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/18\/rank-the-following-compounds-in-order-of-decreasing-acidity-based-upon-the-ka-value-with-being-the-strongest-acid-and-being-the-weakest-acid\/","title":{"rendered":"Rank the following compounds in order of decreasing acidity based upon the Ka value, with being = the strongest acid and being the weakest acid"},"content":{"rendered":"\n

Rank the following compounds in order of decreasing acidity based upon the Ka value, with being = the strongest acid and being the weakest acid. points) OH OH OH OH Rank the following compounds in order of decreasing basicity based upon the Kb value, with bcing – the strongest base and 3 being the weakest base points) NOz OH Rank the following compounds in order of decreasing boiling point with being the highest boiling point and 3 being the lowest boiling point. points) OH<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Here are the correct rankings and explanations for each question:<\/p>\n\n\n\n

\n\n\n\n

Question 3: Acidity Ranking (Ka values)<\/strong>
Compounds:<\/strong><\/p>\n\n\n\n

    \n
  1. Trichloroacetic acid<\/li>\n\n\n\n
  2. Monochloroacetic acid<\/li>\n\n\n\n
  3. Propanoic acid<\/li>\n\n\n\n
  4. Butanoic acid<\/li>\n<\/ol>\n\n\n\n

    Ranking (Strongest to Weakest Acid):<\/strong>
    1 > 4 > 2 > 3<\/strong><\/p>\n\n\n\n

    Explanation:<\/strong>
    Acidity depends on how stable the conjugate base is after deprotonation. Electron-withdrawing groups (EWGs) like chlorine stabilize the conjugate base via inductive effects, increasing acidity.<\/p>\n\n\n\n

      \n
    • Trichloroacetic acid (three Cl groups) has the strongest EWG effect, so it is the strongest acid.<\/li>\n\n\n\n
    • Monochloroacetic acid has one Cl, so it’s next.<\/li>\n\n\n\n
    • Propanoic acid has no EWG, but is still a carboxylic acid.<\/li>\n\n\n\n
    • Butanoic acid is similar to propanoic acid but with a longer alkyl chain that donates electrons, slightly decreasing acidity.<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      Question 4: Basicity Ranking (Kb values)<\/strong>
      Compounds:<\/strong><\/p>\n\n\n\n

        \n
      1. 4-Nitropyridine<\/li>\n\n\n\n
      2. 4-Hydroxypyridine<\/li>\n\n\n\n
      3. 4-Methylpyridine<\/li>\n<\/ol>\n\n\n\n

        Ranking (Strongest to Weakest Base):<\/strong>
        3 > 2 > 1<\/strong><\/p>\n\n\n\n

        Explanation:<\/strong>
        Basicity depends on the availability of the lone pair on the nitrogen atom. Electron-donating groups (EDGs) increase basicity, while EWGs decrease it.<\/p>\n\n\n\n

          \n
        • Methyl is an EDG, making 4-methylpyridine the strongest base.<\/li>\n\n\n\n
        • Hydroxyl has mixed effects; it is slightly electron withdrawing via resonance but donating via induction, placing it in the middle.<\/li>\n\n\n\n
        • Nitro is a strong EWG and pulls electron density away from the nitrogen, making 4-nitropyridine the weakest base.<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          Question 5: Boiling Point Ranking<\/strong>
          Compounds:<\/strong><\/p>\n\n\n\n

            \n
          1. Ethyl methyl ether<\/li>\n\n\n\n
          2. Propanoic acid<\/li>\n\n\n\n
          3. Butanone<\/li>\n<\/ol>\n\n\n\n

            Ranking (Highest to Lowest Boiling Point):<\/strong>
            2 > 3 > 1<\/strong><\/p>\n\n\n\n

            Explanation:<\/strong>
            Boiling point increases with stronger intermolecular forces.<\/p>\n\n\n\n

              \n
            • Propanoic acid can form hydrogen bonds and dimerize, giving it the highest boiling point.<\/li>\n\n\n\n
            • Butanone has dipole-dipole interactions but no hydrogen bonding.<\/li>\n\n\n\n
            • Ethyl methyl ether has only weak dipole-dipole and London dispersion forces, making it the lowest.<\/li>\n<\/ul>\n\n\n\n
              \n\n\n\n

              These rankings are based on molecular structure, electron effects, and intermolecular forces.<\/p>\n\n\n\n

              \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

              Rank the following compounds in order of decreasing acidity based upon the Ka value, with being = the strongest acid and being the weakest acid. points) OH OH OH OH Rank the following compounds in order of decreasing basicity based upon the Kb value, with bcing – the strongest base and 3 being the weakest […]<\/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-238637","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238637","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=238637"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238637\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=238637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=238637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=238637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}