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redox lab - Castrejon 1 Samuel Castrejon Period 1 Redox...

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Castrejon 1 Samuel Castrejon Period 1 10/30/2011 Redox Titration Lab Report Results: The Following Equation was used in this Laboratory Experiment: 2MnO 4 - + 5H 2 O 2 + 6H + - 2Mn +2 + 5O 2 +8H 2 O Part A: 0.1000 mol 0.2500 L 158.04 g KMnO4 = 3.95 g KMnO 4 needed 1 L 1 mol Permanganate Solution 3.95g KMnO 4 1 mole = 0.0250mol KMnO 4 = 0.1000 M 1 158.04 g 0.2500 L Dissociation of KMnO 4 in water KMnO 4 ↔ K + + MnO 4 - Part B Table. Volume of KMnO 4 used to Titrate Hydrogen Peroxide Solution Trial V start (mL) V end (mL) Vt (mL) Mass H2O2 Used Concentration of Standard Solution 1 0.1 41.6 41.5 10.0 g 3% 2 0.4 42.7 42.3 10.0 g 3% Average - - 41.9 10.0 g 3% Mol of H2O2 in Sample

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Castrejon 2 0.0419 KMnO 4 0.1000 mol KMnO 4 5 mol H 2 0 2 = 0.0105 mol H 2 O 2 1 L 2 mol KMnO 4 Grams of H 2 O 2 in Sample 0.0105 mol H 2 O2 34.016 g H 2 O 2 = .357 g H 2 O 2 1 mol H 2 O 2 Percent Hydrogen Peroxide By Mass in Solution: 0.357 g H 2 O 2 = 3.57% H 2 O 2 10g H 2 O 2 Percent Error .03-.0357 x 100 = 18.7 % error 0.03 Conclusion The purpose of this lab was to asses and analyze the percent hydrogen peroxide used inside a common solution that could be found in a drugstore. To do, the solution was titrated
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redox lab - Castrejon 1 Samuel Castrejon Period 1 Redox...

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