hydrohen peroxide.odt - KUMASI TECHNICAL UNIVERSITY...

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KUMASI TECHNICAL UNIVERSITY CHEMICAL ENGINEERING DEPARTMENT ANALYTICAL CHEMISTRY LAB EXPERIMENT;ANALYSIS OF HYDROGEN PEROXIDE SOLUTION LECTURER;REV.JOHANNES AMI
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INTRODUCTION; Titration is a method of volumetric analysis. The use of volume measurement to analyze the concentration of an unknown. The most common type of titration is acid-base titration, in which an acid ,for example ,is analyzed by measuring the amount of standard base solution required to neutralize a known amount of the acid. A similar principle applies to oxidation-reduction reactions. If a solution contains a substance that can be oxidized, then the concentration of that substance can be analyzed by titrating it with a standard solution of a strong oxidizing agent. Oxidation-reduction reaction occurs by electron transfer. The balanced chemical reaction can be written as the combination of two half-reactions,representing the oxidation reaction and the reduction reaction,respectively. In an overall,balanced redox reaction,the number of electron lost by the species being oxidized is always equal to the number of electrons gained by the species being reduced. Hydrogen peroxide is typically regarded as an ‘environmentally friendly’ alternaatively to chlorine for water purification and wastewater treatment. It reaidly decomposes in the presence of heat,light and catalysts. The quality of hydrogen peroxide solution must be regularly checked to ensure its= effectiveness. The concentration of hydrogen peroxide can be analysed by an oxidation-reduction
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