Mg standard Absorbance %RSD 0.5 0.09533 0.3 1 0.1209 0.2 2 0.17304 0.3 5 0.28137 0.2 10 0.56901 0.5 20 0.87153 0.3 5 mL Unk 0.14296 0.2 [1] Make a calibration curve using the absorbances for the samples from 0.5...

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Chemistry

Mg standard Absorbance %RSD
0.5 0.09533 0.3
1 0.1209 0.2
2 0.17304 0.3
5 0.28137 0.2
10 0.56901 0.5
20 0.87153 0.3
5 mL Unk 0.14296 0.2
[1] Make a calibration curve using the absorbances for thesamples from 0.5 â€“ 20 ppm. Include the intercept (0,0) as a datapoint.
[2] Is the calibration linear, i.e., does the analysis followBeerâ€™s law? To discuss linearity, examine both the trend of thedata relative to the least squares line and the correlationcoefficient.
[3] Use a 2nd order polynomial (in Excelâ€™s plotting function) todetermine if the fit improves and include this curve.
[4] Explain why AAS often has a limited linear dynamic rangecompared to say, UV/VIS and fluorescence spectrophotometry

Answer & Explanation Solved by verified expert

3.8 Ratings (493 Votes)

Answer 1The calibration curve from the given data is as followsAnswer 2Calibration graph is not exactly linear However one can saythat it follows Beer Lamberts LawThe calibration curve addins trend line as follows See Answer

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Mg standard	Absorbance	%RSD

0.5	0.09533	0.3
1	0.1209	0.2
2	0.17304	0.3
5	0.28137	0.2
10	0.56901	0.5
20	0.87153	0.3
5 mL Unk	0.14296	0.2