Quant Analysis Potentiometric Titrations - Brooks Micheal...

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Brooks Micheal Brooks Quantitative Analysis Wei Potentiometric Titrations Objective : To use potentiometric titration data to obtain a Gran Plot, titration curve and linear regression to determine the equivalence point and Ka value (dissociation constant); calculate the molecular weight (g/mol); and utilize this information to determine the identity of the unknown acid. Introduction: Potentiometric titrations are a reliable and repid method of determining the equivalence point. A titration curve (pH versus volume of NaOH) is used to estimate the equivalence point and to determine if the acid is monoprotic or diprotic. Materials: 0.1M sodium hydroxide solution 50mL buret 250mL volumetric flask 250mL beaker pH meter with glass electrode buffer solution magnetic stirrer unknown weak monoacid or diprotic acid Procedure:
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