Conductimetric_Titartion.docx - Conductimetric Titration...

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Conductimetric Titration andGravimetric Determinationof a PrecipitateObjectives;The aim of this experiment was:1.To measure the conductivity of the reaction between sulfuric acid and barium hydroxide.2.To use the conductivity values as means of determining the equivalence point of the reaction.3.To measure the mass of the product of the reaction as a means of determining the equivalence point of the reaction gravimetrically.4.To calculate the molar concentration of barium hydroxide solution. Introduction:Conductometry is a measurement of electrolytic conductivity to monitor a process of a chemical reaction. This knowledge is applied in analytical chemistry where conductometric titration is a standard technique. Conductometric titration is a titration in which the electrolytic conductivity of the reaction mixture is continuously monitored as one reactant is added. The equivalence point is the point at which the conductivity undergoes a sudden change as a result of the changing concentrations of the two most highlyconducting ions namely H+and OH-. This experiment involved monitoring the conductivity during the reaction between sulfuric acid and barium hydroxide in order to determine the equivalence point. The reaction between sulfuric acid and barium hydroxide yields an insoluble product, barium sulfate and water as shown in the reaction below;Ba2+(aq) + 2 OH(aq) + 2 H+(aq) + SO42–(aq) → BaSO4(s) + 2 H2O(l)During this reaction, the total number of dissociated ions reduces as the precipitate forms.

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