CHEM 214 General Chemistry II Lab - Experiment 007: Acidity Constant from a Titration Curve.

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Experiment 007: Acidity Constant from a Titration Curve References: Suzanne Slayden, 2018, Chemistry 213, 214, 272 Laboratory Experiments, 7th Edition, pages 207-212. George Mason University, Depa... rtment of Chemistry and Biochemistry. Acidity Constant; 2020. Acidity Constant, Distance Learning Summer 2020, accessed via Blackboard. Purpose The purpose of this experiment is to determine the acidity constant Ka of hydrochloric acid (HCl) and acetic acid (CH3COOH). This will be done by conducting two separate titrations of HCl and CH3COOH with a strong base (NaOH) and tracking the changing pH with a pH meter. The anticipated outcome is that the experimental Ka constants of HCl and CH3COOH will match the theoretical Ka constants of HCl and CH3COOH. The balanced equations for this experiment are: HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l) CH3COOH (aq) + NaOH (aq) → CH3COONa (aq) + H2O (l) Materials • 25-mL Graduated Cylinder • 50-mL Graduated Cylinder • 45 mL of 0.1001-M NaOH Solution • 10 mL of 0.1028-M HCl Solution • 10 mL of 0.1020-M CH3COOH Solution • pH Meter • 50-mL Erlenmeyer Flask • Phenolphthalein Indicator • 2 Burets • Distilled Water [Show More]

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