User:Tamanika Tinsley/Notebook/Chem 581 Biomaterials Design Lab/2014/09/19: Difference between revisions
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==Description== | ==Description== | ||
For your Hg and As experiments, you need to have three concentrations: 150ppm, 100ppm, and 50ppm. | For your Hg and As experiments, you need to have three concentrations: 150ppm, 100ppm, and 50ppm. | ||
==Calculations== | |||
To make 50, 100, and 150 ppm solutions of Mercury and Arsenic, the following calculations were done. | |||
V<sub>1</sub>*Conc.<sub>1</sub>=V<sub>2</sub>*Conc.<sub>2</sub> | |||
Making 50 mL Hg solutions from Dr. Hartings's 268 ppm [[User:Matt_Hartings/Notebook/AU_Biomaterials_Design_Lab/2014/09/19|Hg stock solution]]: | |||
*(50 mL)*(50ppm) = (x)*(268ppm) | |||
**x = [(50 mL)*(50 ppm)]/(268ppm) ='''9.32 mL of Hg Stock Solution''' | |||
*(50 mL)*(100ppm) = (x)*(268ppm) | |||
**x = [(50 mL)*(100 ppm)]/(268ppm) ='''18.66 mL of Hg Stock Solution''' | |||
*(50 mL)*(150ppm) = (x)*(268ppm) | |||
**x = [(50 mL)*(150 ppm)]/(268ppm) ='''27.98 mL of Hg Stock Solution''' | |||
Making 50 mL As solutions from 0.0499 M Arsenite solution: | |||
Converting from M to ppm: | |||
(0.0499 mol Arsenite/L Arsenite)*(74.922 g Arsenic/mol of Arsenite)*(1000 mg Arsenic/1 g Arsenic) = 3738.61 mg/L = 3738.61 ppm | |||
*(100 mL)*(50ppm) = (x)*(3738.61ppm) | |||
**x = [(50 mL)*(50 ppm)]/(3738.61ppm) ='''4.00 mL of Arsenite Stock Solution''' | |||
*(100 mL)*(100ppm) = (x)*(3738.61ppm) | |||
**x = [(50 mL)*(100 ppm)]/(3738.61ppm) ='''2.76 mL of Arsenite Stock Solution''' | |||
*(100 mL)*(150ppm) = (x)*(3738.61ppm) | |||
**x = [(50 mL)*(150 ppm)]/(3738.61ppm) ='''1.32 mL of Arsenite Stock Solution''' | |||
Eleni for prepared the Arsenic solutions. | |||
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Sept 19 - Film Absorbance of Arsenic and Mercury
Objective
DescriptionFor your Hg and As experiments, you need to have three concentrations: 150ppm, 100ppm, and 50ppm. CalculationsTo make 50, 100, and 150 ppm solutions of Mercury and Arsenic, the following calculations were done. V1*Conc.1=V2*Conc.2 Making 50 mL Hg solutions from Dr. Hartings's 268 ppm Hg stock solution:
Making 50 mL As solutions from 0.0499 M Arsenite solution: Converting from M to ppm: (0.0499 mol Arsenite/L Arsenite)*(74.922 g Arsenic/mol of Arsenite)*(1000 mg Arsenic/1 g Arsenic) = 3738.61 mg/L = 3738.61 ppm
Eleni for prepared the Arsenic solutions.
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