Acid and Base Titrations Lab Report - Acid and Base...

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Acid and Base Titrations Purpose and Intro The purpose of a titration is to determine the concentration of a known volume of solution of a known substance. Titrations often involve using acids, bases, indicator solutions, pH meters, and volumetric glassware. In this experiment, a titration was used to standardize a NaOH solution. In a second titration, the standardized NaOH solution was used to determine the previously unknown concentration of an HCl solution. Because the solutions made in this experiment will influence the results of next week’s Soda-ash experiment, the exact concentrations needed to be determined through standardization. Standardizing a solution an be done by running a titration with what is known as a primary standard, or a substance of known stoichiometry, known composition, and high purity. The exact concentration of the NaOH stock solution was determined through the use of primary standard potassium acid phthalate, or KHP. Once the molarity of the NaOH was determined, it was used in a titration to determine the molarity of the HCl stock solution. Procedure Standardization of NaOH 1. Calculate volume of 3M NaOH needed to produce 500mL of 0.1M NaOH solution 2. Measure out 0.4-0.5 grams of KHP and place in a 250mL Erlenmeyer flask

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