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Unformatted text preview: CHEM 6BL Experiment 1: Gravimetry Dr. Sandrine Berniolles 1 1 Experiment 1: Gravimetric Analysis Experiment 1: Gravimetric Analysis c Analytical Chemistry: Fundamental branch of chemistry that involves either:- Identifying the components that make up a compound (qualitative analysis)- Determining the specific amount of a compound (quantitative analysis) c Quantitative Analysis: Gravimetry Gravimetry is the measurement of masses or densities 2 Gravimetric Analysis Methods Gravimetric Analysis Methods c Two primary ways of gravimetric analysis – Combustion: collect the resulting residues – Precipitation: one component is “crashed out” of solution c Experiment #1 involves precipitation – Used to back-calculate concentration of [Al 3+ ] from mass of Aluminum Oxinate (Alq 3 ) 3 Experiment 1 Experiment 1 : Precipitating Agent : Precipitating Agent c Use of an organic precipitating agent – 8-hydroxyquinolinate (Ox – ) c Ox – ("Oxinate") is used to precipitate Al 3+ + H + N OH N O- 8-hydroxy- quinoline (OxH) 8-hydroxy- quinolinate (Ox – ) CHEM 6BL Experiment 1: Gravimetry...
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This note was uploaded on 05/04/2009 for the course CHEM 630888 taught by Professor Berniolles during the Spring '08 term at UCSD.
- Spring '08
- Analytical Chemistry