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Analytical Chemistry 3

الكلية كلية العلوم للبنات     القسم قسم الكيمياء     المرحلة 1
أستاذ المادة محمد حامد سعيد الدهيمي       22/12/2012 18:02:03
Analytical Chemistry
Lecture No. 3 Date :9 /12/ 2012
Dr. Mohammed Hamed
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Titrimetric Methods
Titrimetric analysis consists in determining the number of moles of reagent (titrant), required to react quantitatively with the substance being determined. The titrant can be added (a) volumetrically, with a glass or automatic burette or with a low flow-rate pump, or (b) coulometrically, with an electrochemical generation from a proper electrolyte.
There are many different types of titrations that differ by the titrant used and substances that can be determined. While every titration is different, they all share similar characteristic - but before we will start to discuss them let s define several important terms.
Titrant
Titrant is a substance added from the burette. Titrant used and reaction that proceeds usually defines name of the titration - like acid-base (or alkalimetric) titration if we use strong acid (or strong base) as a titrant, or redox when the reaction that proceeds is of a redox type. Name can be also much more specific - like permanganometric titration (also known as manganometry or permanganometry) when titrant is potassium permanganate.
Titration
A process in which a standard reagent is added to a solution of an analyte until the reaction between the analyte and the reagent is judge to be complete.

Back-titration
A process in which the excess of a standard solution used to react with an analyte is determined by titration with a second standard solution.


المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .