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Analytical Techniques in Chemistry: Sampling, Preparation, and Analysis

Learn about formulating questions, selecting procedures, random vs. segregated sampling, sample preparation methods, analysis techniques, interpreting results, and drawing conclusions in chemistry. Understand tools like mechanical and electronic balances, calibration of volumetric glassware, and buoyancy correction. Practice calculations to determine volumes accurately.

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Analytical Techniques in Chemistry: Sampling, Preparation, and Analysis

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  1. Chapter 0:The Analytical Process (Example)

  2. 1. Formulating the Question 2. Selecting Analytical Procedures

  3. 3. Sampling

  4. Random Heterogeneous Material

  5. Segregated Heterogeneous Material

  6. 4. Sample Preparation

  7. 5. Analysis

  8. 6. Reporting and Interpretation 7. Drawing Conclusions

  9. representative sampling – random vs. segregated sample preparation extraction, centrifugation, filtering chromatography, stationary phase, adsorption aliquot calibration curve Terminology to Know From the Example

  10. Chapter 2: Tools of the Trade

  11. Mechanical Balance

  12. Electronic Balance

  13. Buoyancy correction - a sample appears lighter than its actual mass by an amount equal to the mass of the air it displaces. Example: Find the true mass of water (density = 1.00 g/mL) if the apparent mass is 100.00g

  14. Calibration of Volumetric Glassware True volume = mass H2O x correction factor Example p. 49: an empty weighing bottle had a mass of 10.283 g. After water was added from a 25-mL pipet, the mass was 35.225 g. The temperature was 23oC. Find the volume of water delivered by the pipet.

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