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In this investigation, you assume the role of a laboratory technician working in a consumer advocacy laboratory, testing the concentration of a hydrogen peroxide solution. The labeled percent concentration of hydrogen peroxide on the commercial product is 3.0%. Purpose The technological purpose of this investigation is to test and evaluate the percent concentration of the consumer solution of hydrogen peroxide. Problem What is the percent concentration of hydrogen peroxide in a consumer product? Prediction According to the manufacturer's label, the concentration of hydrogen peroxide is 3%. Design An acidic solution of the primary standard, iron(II) ammonium sulfate–water (1/6), is prepared and the potassium permanganate solution is standardized by a titration with this primary standard. A 25.0 mL sample of a consumer solution of hydrogen peroxide is diluted to 1.00 L with water (that is, it is diluted by a factor of 40). The standardized potassium permanganate solution is used to titrate the diluted and acidified hydrogen peroxide. The amount concentration of the original hydrogen peroxide is obtained by analysis of the titration evidence, and by using the graph below. Safety Precautions Sulfuric acid is corrosive. Iron(II) ammonium sulfate, hydrogen peroxide, and potassium permanganate are irritants. Avoid inhaling any solid, and avoid skin or eye contact. Pre-Lab Solve step by step for: Calculate the required mass of FeSO4•(NH4)2SO4•6H2O(s) to prepare 100.0 mL of a 0.0500 mol/L solution.