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Jose g. cruzrivera Cristina m. cruzirizarry   Dr. resto   Rise program Determine the concentrations of manganese in a pill
Introduction Analytical chemistry concentrates in the analysis of chemical components in materials. Manganese is essential in the development and maintenance of bones. Calculating the concentration of manganese in a pill called Arthu Z with 4mg of manganese.
Hypothesis When we calculate the concentration of manganese in the pill; we will find less concentration of the mineral when we compare it to the label of the package.
Procedure #1 Weight two pills and find the average weight. Find the percentage of manganese in a pill. 			0.31% Crush and dilute 0.6 g of the pill with water in a beaker of 250.0 mL.  Add 50.0 mL of HNO3 (Nitric Acid) to 3 aliquots and 0.25 g NaIO4 (Sodium Periodate) to only 2 of the aliquots.  Heat the solutions.
Continuation After Before
Procedure #2 6 mL of KMnO4 (Potassium Permanganate) dilute in a 100.0 mL volumetric flask to make 8 aliquots of: 1, 3 ,5 , 7, 9,10, 12 and 15 mL. Using the spec-20 determine the transmittance of the 8 aliquots and the 3 other aliquots that contain the pill, then calculate the absorbance. Calculate the concentration of the 8 aliquots. After finding the transmittance of the 3 aliquots, we compared this to the transmittance of the 8 aliquots that we know the concentration.
Absorbance vs. Concentration
Results We found 2.7 g of manganese(Mn) in the vitamin supplement pill.
Conclusion Our hypothesis was confirmed, the label says 4.0 mg of manganese, but we found 2.7 mg. Many pharmaceutical factories don’t analyze there products. Federal agencies should be more strict with the production of supplements.
References Silberberg, M.S.; “Chemistry, The Molecular Nature of Matter and Change”, 5ta ed.; McGraw Hill: New York, 2005.  Nivaldo, J.; “Chemistry: A Molecular Approach”, 2nd ed.; Prentice Hall: Westmont College, 2008.  Kotz, Treichel, Weaver; “Chemistry & Chemical Reactivity”, 6th ed.; Thomson Learning Inc., 2006.

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Determine the concentrations of manganese in a pill

  • 1. Jose g. cruzrivera Cristina m. cruzirizarry Dr. resto Rise program Determine the concentrations of manganese in a pill
  • 2. Introduction Analytical chemistry concentrates in the analysis of chemical components in materials. Manganese is essential in the development and maintenance of bones. Calculating the concentration of manganese in a pill called Arthu Z with 4mg of manganese.
  • 3. Hypothesis When we calculate the concentration of manganese in the pill; we will find less concentration of the mineral when we compare it to the label of the package.
  • 4. Procedure #1 Weight two pills and find the average weight. Find the percentage of manganese in a pill. 0.31% Crush and dilute 0.6 g of the pill with water in a beaker of 250.0 mL. Add 50.0 mL of HNO3 (Nitric Acid) to 3 aliquots and 0.25 g NaIO4 (Sodium Periodate) to only 2 of the aliquots. Heat the solutions.
  • 6. Procedure #2 6 mL of KMnO4 (Potassium Permanganate) dilute in a 100.0 mL volumetric flask to make 8 aliquots of: 1, 3 ,5 , 7, 9,10, 12 and 15 mL. Using the spec-20 determine the transmittance of the 8 aliquots and the 3 other aliquots that contain the pill, then calculate the absorbance. Calculate the concentration of the 8 aliquots. After finding the transmittance of the 3 aliquots, we compared this to the transmittance of the 8 aliquots that we know the concentration.
  • 8. Results We found 2.7 g of manganese(Mn) in the vitamin supplement pill.
  • 9. Conclusion Our hypothesis was confirmed, the label says 4.0 mg of manganese, but we found 2.7 mg. Many pharmaceutical factories don’t analyze there products. Federal agencies should be more strict with the production of supplements.
  • 10. References Silberberg, M.S.; “Chemistry, The Molecular Nature of Matter and Change”, 5ta ed.; McGraw Hill: New York, 2005. Nivaldo, J.; “Chemistry: A Molecular Approach”, 2nd ed.; Prentice Hall: Westmont College, 2008. Kotz, Treichel, Weaver; “Chemistry & Chemical Reactivity”, 6th ed.; Thomson Learning Inc., 2006.

Editor's Notes

  1. After