Based on the given data, construct and evaluate the calibration curve by plotting absorbance versus concentration. Calculate the mean concentration of Copper and Chromium in the unknown tap water sample CuAbsorbance 1Absorbance 2Absorbance 3Mean + SD|standard(ppm)10.05210.05200.05220.0521 + 0.000120.10110.10120.10130.1012 + 0.000130.15760.15780.15770.1577 + 0.000140.21190.21200.21210.2120 + 0.000150.26880.26810.26850.2685 + 0.0003UnknownAbsorbance 1Absorbance 2Absorbance 3Mean + SDsampleWater sample 1(1:10 dilution)0.16490.16480.1701 CrAbsorbance 1Absorbance 2Absorbance 3Mean + SDstandard(ppm)10.04190.04250.04200.0421 + 0.002020.07780.07800.07790.0779 + 0.000130.10400.10430.10410.1041 + 0.000240.13680.13690.13720.1367 + 0.000450.16460.16470.16490.1647 + 0.0002UnknownAbsorbance 1Absorbance 2Absorbance 3Mean + SDsampleWater sample 1(1:20 dilution)0.04880.04890.0501

#Calculation for the mean concentration of Copper: Mean absorbance of the diluted (1:10) unknown tap…

Based on the given data, construct and evaluate the calibration curve by plotting absorbance versus concentration. Calculate the mean concentration of Copper and Chromium in the unknown tap water sample

Based on the given data, construct and evaluate the calibration curve by plotting absorbance versus concentration. Calculate the mean concentration of Copper and Chromium in the unknown tap water sample

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter1: Matter And Measurements

Section: Chapter Questions

Problem 16QAP: Computers are not supposed to be in very warm rooms. The highest temperature tolerated for maximum...

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Concept explainers

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.

Question

Cu
Absorbance 1
Absorbance 2
Absorbance 3
Mean + SD|
standard(ppm)
1
0.0521
0.0520
0.0522
0.0521 + 0.0001
2
0.1011
0.1012
0.1013
0.1012 + 0.0001
3
0.1576
0.1578
0.1577
0.1577 + 0.0001
4
0.2119
0.2120
0.2121
0.2120 + 0.0001
5
0.2688
0.2681
0.2685
0.2685 + 0.0003
Unknown
Absorbance 1
Absorbance 2
Absorbance 3
Mean + SD
sample
Water sample 1
(1:10 dilution)
0.1649
0.1648
0.1701

Cr
Absorbance 1
Absorbance 2
Absorbance 3
Mean + SD
standard(ppm)
1
0.0419
0.0425
0.0420
0.0421 + 0.0020
2
0.0778
0.0780
0.0779
0.0779 + 0.0001
3
0.1040
0.1043
0.1041
0.1041 + 0.0002
4
0.1368
0.1369
0.1372
0.1367 + 0.0004
5
0.1646
0.1647
0.1649
0.1647 + 0.0002
Unknown
Absorbance 1
Absorbance 2
Absorbance 3
Mean + SD
sample
Water sample 1
(1:20 dilution)
0.0488
0.0489
0.0501

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