Abstract Lab 10

Abstract Lab 10 - iron in the tablet was 7.03%. Thus, the...

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General Chemistry laboratory, Chem18 Experiment # 10 Date of Experiment: 11/29/2011 Date of Submission: 12/06/2011 Abstract: This lab was performed in two parts: the first involved dissolving a green-colored brand I iron tablet in hydrochloric acid to then filter out the solid residue from the tablet and dilute the rest of the solution, and the second involved using an atomic absorption spectrometer to determine the iron content in the solution. In a flask, 5 mL of iron solution was diluted to 100 mL and tested in the atomic absorption spectrometer, turning the flame purple due to the iron content. The measured weight of the tablet was 0.3668 g, and the average iron concentration in the solution was 5.159 mg/L. After calculation, the weight of iron in the tablet was 25.8 mg, whereas the reported value on the manufacturer’s label was 27 mg of iron per tablet. The calculated weight percent of
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Unformatted text preview: iron in the tablet was 7.03%. Thus, the relative error in accuracy was -4.5% and the relative standard deviation was 0.72%, meaning that systematic errors were greater than the random errors. Most of these errors could be attributed to procedural error, as each individual tablet may not have the exact same iron content as listed on the label. Also, the solution may have been diluted more than needed in preparing the iron solution, which would result in a lower weight percentage than the actual weight. The dangers of iron toxicity were also explored in this lab, and an overabundance of iron in the bloodstream can lead to harmful and sometimes fatal health problems. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name Liz Zharovsky Bench C19 Lab day and section Tuesday - 2 TA Ramyaa Mathialagan Partner N/A Title: Atomic absorption spectroscopy: Iron in Tablets...
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This note was uploaded on 01/23/2012 for the course CHEM 18a taught by Professor Dolnik during the Fall '06 term at Brandeis.

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