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Determine the concentration of lead in a given solution by gravimetric analysis, EDTA titration, spectrophotometry, and atomic absorption, and compare the advantages and disadvantages of each method.
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| Submitted: Tue May 18 2004
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Rhiannon Edwards 27/02/2004 Determination of Lead Objectives: To determine the concentration of lead in a given solution by gravimetric analysis, EDTA titration, spectrophotometry, and atomic absorption, and compare the advantages and disadvantages of each method. Calibration of Pipette Apparatus: * 20ml pipette * Stoppered flask Method: 1) A 20ml pipette was cleaned with a dilute solution of detergent, and rinsed thoroughly with distilled water. 2) The pipette was then filled with distilled water. 3) The water is then run out into a weighed flask. 4) The flask is then re-weighed. Results: Weight of Flask (g) Weight of Flask and Water (g) Weight of water (g) 29.9529 49.8378 19.8849 29.9521 49.9329 19.9808 Difference of the weight of water: 19.9808 - 19.8849 = 0.1ml Average weight of water: 19.9808 + 19.8849 = 19.9329 2 Temperature of water = 25oC True volume of water contained by the 20ml pipette = 19.9329 x 0.99609 = 19.8550 Gravametric Analysis: Apparatus: * 2 x 400ml beaker * 20ml calibrated pipette * Hot plate * Oven (120oC) * 2 x Sintered glass crucibles Method: 1) Two sintered glass crucibles with dilute...
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