110606Spectrophotometer Lab

110606Spectrophotometer Lab - 0.152 3 7 0.02217 1.30803...

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9 Spectrophotometer CH 141 Laura Dunn 11/7/06 Section 101
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Purpose : To measure the amount of absorption at different wavelengths and from that calculate the molarity and g/L of a substance. Procedure : Refer to lab text. Data : Wavelength (nm) Amplitude (A) 450 0.053 470 0.114 490 0.212 510 0.272 530 0.325 550 0.297 570 0.186 590 0.080 610 0.036 630 0.024 650 0.024 Max wavelength= 530 nm Stock soln. (ml) Water (ml) Conc Co +2 (M) Conc. Co +2 (g/L) A 9 ml 1 ml 0.06651 M 3.92409 g/L 0.336 8 2 0.05912 3.48808 0.295 7 3 0.05173 3.05207 0.255 6 4 0.04434 2.61606 0.221 5 5 0.03695 2.18005 0.190 4 6 0.02956 1.74404
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Unformatted text preview: 0.152 3 7 0.02217 1.30803 0.108 2 8 0.01478 0.87202 0.082 1 9 0.00739 0.43601 0.039 Unk. A 4.1 0.355 Calculations : Results: My results found Unknown A to have Co +2 of 4.1 g/L. The goal of this experiment to measure the amount of absorption at different wavelengths and from that calculate the molarity and g/L of a substance was achieved. Human error altered this experiment because the max wavelength was supposed to be 510, and caused errors throughout....
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110606Spectrophotometer Lab - 0.152 3 7 0.02217 1.30803...

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