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Chapter 16: Applications of Neutralization Titrations. CHE 321: Quantitative Chemical Analysis Dr. Jerome Williams, Ph.D. Saint Leo University. Overview. Reagents for NeutralizationTitrations Typical Applications Neutralization Titrations. Neutralization Titrations. - PowerPoint PPT Presentation
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Chapter 16: Applications of Neutralization Titrations
CHE 321: Quantitative Chemical AnalysisDr. Jerome Williams, Ph.D.
Saint Leo University
Neutralization Titrations
• Neutralization titrations are widely used to determine concentration of analytes that are themselves acids or bases.
• Normally use water as solvent system; some cases require non-aqueous solvents due to solubility or other constraints.
Reagents for Neutralization Titrations
• Standard Acid Solutions are most easily prepared from stock concentrated solutions of strong acids (e.g., hydrochloric, perchloric, or sulfuric acids). They are stable indefinitely.
• Once prepared the acid solution must be standardized against a primary standard base like sodium carbonate, TRIS, sodium tetraborate decahydrate.
Reagents for Neutralization Titrations
• Standard Base Solutions are most easily prepared from stock concentrated solutions of strong bases (e.g., sodium hydroxide, potassium hydroxide or barium hydroxide).
• Once prepared the base solution must be standardized against a primary standard acid like potassium hydrogen phthalate (KHP), benzoic acid, potassium hydrogen iodate.
Applications: Neutralization Titrations
• Elemental Analysis – Nitrogen analysis (Kjeldahl methods) – Sulfur analysis– Other Elements (see Table 16.1)
• Inorganic & Organic Substances – Review methodologies