Guias Harris 8Ed

Experiments
To Accompany Quantitative Chemical Analysis, 7th Edition (2006) Daniel C. Harris 1. 2 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. Calibration of Volumetric Glassware Gravimetric Determination of Calcium as CaC2O4.H2O Gravimetric Determination of Iron as Fe2O3 Penny Statistics Statistical Evaluation of Acid-BaseIndicators Preparing Standard Acid and Base Using a pH Electrode for an Acid-Base Titration Analysis of a Mixture of Carbonate and Bicarbonate Analysis of an Acid-Base Titration Curve: The Gran Plot Kjeldahl Nitrogen Analysis EDTA Titration of Ca2+ and Mg2+ in Natural Waters Synthesis and Analysis of Ammonium Decavanadate Iodimetric Titration of Vitamin C Preparation and Iodometric Analysis ofHigh-Temperature Superconductor Potentiometric Halide Titration with Ag+ Electrogravimetric Analysis of Copper Polarographic Measurement of an Equilibrium Constant Coulometric Titration of Cyclohexene with Bromine Spectrophotometric Determination of Iron in Vitamin Tablets Microscale Spectrophotometric Measurement of Iron in Foods by Standard Addition Spectrophotometric Measurement of an EquilibriumConstant Spectrophotometric Analysis of a Mixture: Caffeine and Benzoic Acid in Soft Drink Mn2+ Standardization by EDTA Titration Measuring Manganese in Steel by Spectrophotometry with Standard Addition Measuring Manganese in Steel by Atomic Absorption Using a Calibration Curve Properties of an Ion-Exchange Resin Analysis of Sulfur in Coal by Ion Chromatography Measuring Carbon Monoxide in AutomobileExhaust by Gas Chromatography Amino Acid Analysis by Capillary Electrophoresis DNA Composition by High-Performance Liquid Chromatography Analysis of Analgesic Tablets by High-Performance Liquid Chromatography Anion Content of Drinking Water by Capillary Electrophoresis 2 3 5 8 15 18 19 22 24 26 29 31 35 36 40 43 44 46 48 50 52 54 57 59 63 66 69 71 73 77 80 82

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Experiments
Experimentsdescribed here illustrate major analytical techniques described in the textbook, Quantitative Chemical Analysis. Procedures are organized roughly in the same order as topics in the text. You are invited to download these instructions and reproduce them freely for use in your laboratory. References to many additional experiments published in recent years in the Journal of Chemical Education1 are listedat the web site where you found these experiments. Some of the experiments refer to the availability of standards or unknowns from Thorn Smith.2 Although these procedures are safe when carried out with reasonable care, all chemical experiments are potentially hazardous. Any solution that fumes (such as concentrated HCl), and all nonaqueous solvents, should be handled in a fume hood. Pipettingshould never be done by mouth. Spills on your body should be flooded immediately with water and washed with soap and water; your instructor should be notified for possible further action. Spills on the benchtop should be cleaned immediately. Toxic chemicals should not be flushed down the drain. Your instructor should establish a procedure for disposing of each chemical that you use.

1.Calibration of Volumetric Glassware

An important trait of good analysts is the ability to extract the best possible data from their equipment. For this purpose, it is desirable to calibrate your own volumetric glassware (burets, pipets, flasks, etc.) to measure the exact volumes delivered or contained. This experiment also promotes improved technique in handling volumetric glassware. The procedure forcalibrating a 50-mL buret is described at the end of Chapter 2 of the textbook. Other volumetric glassware can also be calibrated by measuring the mass of water they contain or deliver. Glass transfer pipets and plastic micropipets can be calibrated by weighing the water delivered from them. A volumetric flask can be calibrated by weighing it empty and then weighing it filled to the mark with...