{"id":3158,"date":"2024-04-07T22:09:07","date_gmt":"2024-04-07T20:09:07","guid":{"rendered":"https:\/\/mxth.dk\/?p=3158"},"modified":"2024-04-08T10:03:00","modified_gmt":"2024-04-08T08:03:00","slug":"titrering-af-en-syre-med-en-base","status":"publish","type":"page","link":"https:\/\/mxth.dk\/?page_id=3158","title":{"rendered":"Titrering af en syre med en base"},"content":{"rendered":"\n
<\/span>\"\"

FORS\u00d8G<\/p>\n\n

titrering af en syre med en base<\/p><\/div><\/div>\n\n\n\n

N\u00e5r en syrer reagere med vand dannes der oxoniumioner, som for eksempel saltsyres reaktion med vand<\/p>\n\n\n\n

\\(HCl (aq) + H_2O(l)\\rightarrow Cl^-(aq)+H_3O^+(aq)\\)<\/p>\n\n\n\n

For en bases reaktion med vand dannes der hydroxidioner, som n\u00e5r ammoniak reagere med vand<\/p>\n\n\n\n

\\(NH_3(aq)+H_2O(l)\\rightarrow NH_4+(aq)+OH^-(aq)\\)<\/p>\n\n\n\n

For syrer dannes der derfor oxoniumioner og for baser dannes der hydroxidioner. Hvis en syre og en base danne vil de to ioner kunne reagere med hinanden og derved danne vand<\/p>\n\n\n\n

\\(H_3O^+(aq)+OH^-(aq)\\rightarrow 2H_2O(l)\\)<\/p>\n\n\n\n

De to ioner \u201coph\u00e6ver\u201d hinanden og derved \u00e6ndre pH. Hvis syren og basen blandes i \u00e6kvivalente m\u00e6ngder vil pH \u00e6ndre sig til pH 7 ogs\u00e5 kaldet for \u00e6kvivalenspunktet p\u00e5 en titreringskurve. For en titrering af en syre med en base er det netop dette vi er ude efter. \u00c6kvivalenspunktet bestemmes med en syre-base-indikator.<\/p>\n\n\n

Form\u00e5l<\/h2>\n\n\n

At bestemme koncentrationen p\u00e5 en syre med en ukendt koncentration.<\/p>\n\n\n

Apperatur<\/h2>\n\n
    \n
  • 100 mL konisk kolbe<\/li>\n\n\n\n
  • magnetomr\u00f8rer med magnet<\/li>\n\n\n\n
  • 20 mL fuldpipette og sugebold<\/li>\n\n\n\n
  • Burette i stativ<\/li>\n<\/ul>\n\n

    Kemikalier<\/h2>\n\n
      \n
    • Saltsyre med en ukendt koncentration<\/li>\n\n\n\n
    • 0,100 M NaOH (aq)<\/li>\n\n\n\n
    • indikator (phenolphthalein)<\/li>\n<\/ul>\n\n

      Fremgangsm\u00e5de<\/h2>\n\n
        \n
      • Unders\u00f8g sikkerhedsforanstaltningerne for de givne kemikalier<\/li>\n\n\n\n
      • Overf\u00f8r 20,0 mL saltsyre til den koniske kolbe<\/li>\n\n\n\n
      • Tils\u00e6t ca. fem dr\u00e5ber phenolphthalein<\/li>\n\n\n\n
      • Fyld burette med 0,10 M natriumhydroxid<\/li>\n\n\n\n
      • P\u00e5begynd en f\u00f8rste titreringen relativt hurtigt (v\u00e6r opm\u00e6rksom p\u00e5 farveskriftet som er fra klar til lyser\u00f8d). Noter hvor meget natriumhydroxid der er blevet tilsat syren.<\/li>\n\n\n\n
      • Genfyld buretten med natriumhydroxid og gentag m\u00e5lingen nu med st\u00f8rre pr\u00e6cision.<\/li>\n<\/ul>\n\n

        Databehandling<\/h2>\n\n
          \n
        • Beregn koncentrationen af saltsyreopl\u00f8sningen<\/li>\n\n\n\n
        • Sammenlign med de andre grupper og beregn gennemsnittet<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

          At bestemme koncentrationen p\u00e5 en syre med en ukendt koncentration.<\/p>\n","protected":false},"author":1,"featured_media":3162,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[55,43],"tags":[],"class_list":["post-3158","page","type-page","status-publish","has-post-thumbnail","hentry","category-forsoeg-kemi","category-kemi"],"featured_image_src":"https:\/\/i0.wp.com\/mxth.dk\/wp-content\/uploads\/2024\/04\/IMG_7348.webp?fit=390%2C280&ssl=1","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/3158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3158"}],"version-history":[{"count":5,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/3158\/revisions"}],"predecessor-version":[{"id":3599,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/3158\/revisions\/3599"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/media\/3162"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}