(B) To standardize a potassium permanganate solution, a 0.250 g sample of FAS (i
ID: 866968 • Letter: #
Question
(B) To standardize a potassium permanganate solution, a 0.250 g sample of FAS (iron(II) ammonium sulfate hexahydrate; molar mass: 342 g) is dissolved in 25.00 mL distilled water, then acidified with sulfuric acid. The solution is then titrated with 35.00 mL potassium permanganate solution from a buret until a pale persistent purple color is attained. Calculate the molarity of the potassium permanganate solution. (C) The standardized potassium permanganate solution is then used to titrate a solution made by dissolving a 0.500 gram sample of a mixture of iron(II) sulfate and sodium sulfate in 50.00 mL dilute sulfuric acid. A total of 10.21 mL of potassium permanganate solution is required to reach the pale purple endpoint. What is the mass percent of iron(II) sulfate in the original mixture?Explanation / Answer
B)
Given:
Mass of FAS = 0.250 g
Molar mass of FAS= 342 g
Volume of water =25.0 mL
Volume of potassium permanganate solution =35.00 mL
Solution:
We have to write the balanced (overall) reaction between FAS and KMnO4
MnO4- + 5Fe2+ + 8H+ ---
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.