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VOLUMETRIC ANALYSIS Volumetric Analysis - a procedure that accurately measures the volumes of solutions in order to determine the concentration of an unknown solution. The experimental procedure is called titration. For example, an acid-base titration will allow for the calculation of an unknown concentration of either the acid or base. In order to ensure accuracy, the titration is done at least. Titration - the progressive addition of a base to an acid Endpoint - the change in colour of indicator marks the point where neutralization is complete. Materials used in titration : Erlenmeyer flask - contains the unknown acid or base with precise volume Pipette - used to transfer precise and very accurate volumes of solution Burette - device for dispensing very precise volumes of solutions. Indicator- provides visual evidence of the magnitude of [H+] present in the solution. Acid-base indicators contain dye that is extremely sensitive to little amounts of acid. Examples of indicators: Phenophthalein Bromothymol Blue Universal indicator Calculation Example: In a titration, 10 mL of sodium hydroxide solution was neutralized by 16.36 mL of sulfuric acid (0.1286 M). Determine the concentration of sodium hydroxide.
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