{"id":1513,"date":"2025-04-15T11:11:41","date_gmt":"2025-04-15T11:11:41","guid":{"rendered":"https:\/\/medpharma12.com\/?p=1513"},"modified":"2025-04-16T08:55:55","modified_gmt":"2025-04-16T08:55:55","slug":"organic-chemistry-practical-bp-208p","status":"publish","type":"post","link":"https:\/\/medpharma12.com\/index.php\/2025\/04\/15\/organic-chemistry-practical-bp-208p\/","title":{"rendered":"To determine the melting point of given organic compound."},"content":{"rendered":"

Experiment-1 <\/strong><\/span><\/h4>\n

Object –<\/strong> To determine the melting point of given organic compound.<\/span><\/p>\n

References: <\/strong><\/span><\/p>\n

    \n
  1. Vogel Arthere, Elementary practical organic chemistry, 2nd edition, 1966, published by CBS publisher, page No. 3-12.<\/span><\/li>\n
  2. Agarwal O.P., Practical Organic chemistry, published by Krishna educational publisher, Edition 2014, page no. 60-64.\u00a0\u00a0<\/span><\/li>\n<\/ol>\n

    Requirements<\/strong> \u2013 Given Solid Substance, Capillary Tube, Melting Point apparatus.<\/span><\/p>\n

    Theory-<\/strong> <\/span><\/p>\n

    The change from solid to liquid state of a compound in heating is called melting and the temperature at which a solid in its pure form melts is called the melting point. Every pure solid has a characteristics melting point therefore determination of melting point helps in identification of the compound. <\/span><\/p>\n

    Presence of impurities lowers the melting point of the solid. Thus Melting point also serves as a criterion of purity of a compound. <\/span><\/p>\n

    Procedure- <\/strong><\/span><\/p>\n

      \n
    1. Take a fine capillary of length 5-6cm. <\/span><\/li>\n
    2. seal its one end by inserting the end of the capillary tube horizontally into the extreme edge of a small steady Bunsen flame for a few seconds, rotating the capillary mean while. <\/span><\/li>\n
    3. \u00a0Take a small quantity of the compound whose melting point is to be determined in\u00a0 mortar pestle and powder it. <\/span><\/li>\n
    4. Introduce the powdered compound in the capillary tube.<\/span><\/li>\n
    5. Gently tap the capillary tube so that the compound sinks into the closed end. <\/span><\/li>\n
    6. Repeat the procedure of introducing and tapping three to four times.<\/span><\/li>\n
    7. Put the capillary in digital melting point apparatus.<\/span><\/li>\n
    8. observe the temp. at which it start to melt.<\/span><\/li>\n
    9. Finally note the temp. at which it completely melt.<\/span><\/li>\n<\/ol>\n

      Observations<\/strong>– <\/span><\/p>\n

      Melting point <\/span><\/p>\n

      1 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u20260C <\/span><\/p>\n

      2 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u20260C <\/span><\/p>\n

      3\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u20260C <\/span><\/p>\n

      Mean Melting point = (t1+t2+t3)\/3 0C<\/span><\/p>\n

      Result: <\/strong>The melting point of the given organic compound is…………………………………….<\/span><\/p>\n

      Precaution-<\/strong> <\/span><\/p>\n

      1. The capillary tube is filled one third of its length. <\/span><\/p>\n

      2. The rate of heating should be controlled. <\/span><\/p>\n

      3. It should be very slow near the melting point so that the melting point can be recorded accurately.<\/span><\/p>\n

       <\/p>\n

      Melting point of some common organic compounds<\/strong>\u00a0<\/span><\/p>\n

      Phenol : 42<\/span>
      \n\u03b1-Naphthylamine: 50<\/span>
      \n\u03b1-Naphthol : 96<\/span>
      \nAcetamide: 82<\/span>
      \n\u03b2-Naphthol: 123<\/span>
      \nBenzamide: 128<\/span><\/p>\n

      Oxalic Acid: 101<\/span>
      \nUrea : 132<\/span>
      \nBenzoic Acid : 122<\/span>
      \nFructose : 103<\/span>
      \nCinnamic Acid : 133<\/span>
      \nGlucose : 146<\/span>
      \np-Toludine: 43<\/span>
      \nSucrose: 186<\/span>
      \nNaththalene : 80<\/span>
      \nAcetanilide : 114.3<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

      Experiment-1 Object – To determine the melting point of given organic compound. References: Vogel Arthere, Elementary practical organic chemistry, 2nd edition, 1966, published by CBS publisher, page No. 3-12. Agarwal O.P., Practical Organic chemistry, published by Krishna educational publisher, Edition 2014, page no. 60-64.\u00a0\u00a0 Requirements \u2013 Given Solid Substance, Capillary Tube, Melting Point apparatus. Theory- […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","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":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","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":"","_glsr_average":0,"_glsr_ranking":0,"_glsr_reviews":0},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/posts\/1513"}],"collection":[{"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/comments?post=1513"}],"version-history":[{"count":2,"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/posts\/1513\/revisions"}],"predecessor-version":[{"id":1515,"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/posts\/1513\/revisions\/1515"}],"wp:attachment":[{"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/media?parent=1513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/categories?post=1513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/medpharma12.com\/index.php\/wp-json\/wp\/v2\/tags?post=1513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}