The concentration of Mg in an unknown sample was determined by pipetting 15.0 ml of the unknown sample into five 50 ml volumetric flasks. Various volumes of a standard containing 22.6 ppm of Mg were added to the flasks and the solution were then filled with deionised water to a volume of 50 ml.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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The concentration of Mg in an unknown sample was determined by pipetting 15.0 ml of the unknown sample into five 50 ml volumetric flasks.
Various volumes of a standard containing 22.6 ppm of Mg were added to the flasks and the solution were then filled with deionised water to a
volume of 50 ml.
Unknown,ml
15.0
15.0
15.0
15.0
Standard,ml
C.
D. 1.5 ppm
0.0
1.0
2.0
3.0
Calculate the ppm of Mg in the sample.
O A. 4.6 ppm
B. 1.9 ppm
3.3 ppm
Absorbance
0.191
0.282
0.368
0.457
Transcribed Image Text:The concentration of Mg in an unknown sample was determined by pipetting 15.0 ml of the unknown sample into five 50 ml volumetric flasks. Various volumes of a standard containing 22.6 ppm of Mg were added to the flasks and the solution were then filled with deionised water to a volume of 50 ml. Unknown,ml 15.0 15.0 15.0 15.0 Standard,ml C. D. 1.5 ppm 0.0 1.0 2.0 3.0 Calculate the ppm of Mg in the sample. O A. 4.6 ppm B. 1.9 ppm 3.3 ppm Absorbance 0.191 0.282 0.368 0.457
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