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Unformatted text preview: 4. Our observed wavelength given off was 595nm. By looking at the elements that give off photons close to 595nm, it can be observed that the unknown element is Sodium. 5. Molarity of Solution of CoCl 2 Absorbance 0.05M 0.301 0.10M 0.530 0.15M 0.782 0.20M 1.035 = A εcl = ε Acl = . . . ε 0 3010 05M0 01m = = ε 602ε Acl = . . . ε 0 5300 10M0 01m = ε 530 = ε Acl = . . . ε 0 7820 15M0 01m = ε 521 = ε Acl = . . . ε 1 0350 20M0 01m = = + + + ε 518ε ε1 ε2 ε3 ε44 = + + + ε 602 530 521 5184 = ε 543 Standard Deviation = 34.5 6. Besides the known reason why the Helium discharge lamp was not accurate, the rest of the lab was very accurate because most of the data was received by observation. The only errors that could have occurred may have arose if the calibration of the spectrometer was not done properly or if the observer was not looking direction straightly through the spectrometer when reading the measurements....
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This lab report was uploaded on 04/07/2008 for the course CHEM 1000 taught by Professor Mcintosh during the Fall '07 term at Rensselaer Polytechnic Institute.
- Fall '07