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A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of 0.03 M KMnO4 solution to reach the end point. Number of moles of Fe2+ present in 250 mL solution is x × 10−2 (consider complete dissolution of FeCl2). The amount of iron present in the sample is y% by weight.
(Assume: KMnO4 reacts only with Fe2+ in the solution, Use: Molar mass of iron as 56 g mol−1)
Q. The value of x is _______.
    Correct answer is '1.88'. Can you explain this answer?
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    A sample (5.6 g) containing iron is completely dissolved in cold dilut...
    The balanced equation for the reaction between Fe2+ and KMnO4 in acidic solution is:

    5Fe2+ + MnO4- + 8H+ → 5Fe3+ + Mn2+ + 4H2O

    From the balanced equation, we can see that 1 mole of KMnO4 reacts with 5 moles of Fe2+. Therefore, the number of moles of Fe2+ in the 25.0 mL of solution titrated with 12.5 mL of 0.03 M KMnO4 is:

    moles of Fe2+ = (0.03 mol/L) x (12.5 mL/1000 mL) x 1/5 = 0.000015 mol

    Since 25.0 mL represents 1/10 of the original 250 mL solution, the number of moles of Fe2+ in the original solution is:

    moles of Fe2+ in 250 mL = 10 x 0.000015 mol = 0.00015 mol

    Finally, we can calculate the mass of Fe2+ in the original sample (5.6 g) using the molar mass of Fe:

    mass of Fe2+ = 0.00015 mol x 2 x 55.85 g/mol = 0.0166 g

    Therefore, the number of moles of Fe2+ present in 250 mL solution is:

    x = 0.00015 mol
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    A sample (5.6 g) containing iron is completely dissolved in cold dilut...



    Volume of Fe2+ solution titrated, V1 = 25.0 mL
    Concentration of MnO-4, M2 = 0.03 M

    Using relation, 

    n2M1V1 = n1M2V2 [n1 and n2 are number of moles of Fe2+ and MnO-4 reacting]

    The value of x is 1.88.
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    A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of 0.03 M KMnO4 solution to reach the end point. Number of moles of Fe2+ present in 250 mL solution is x × 10−2 (consider complete dissolution of FeCl2). The amount of iron present in the sample is y% by weight.(Assume: KMnO4 reacts only with Fe2+ in the solution, Use: Molar mass of iron as 56 g mol−1)Q. The value of x is _______.Correct answer is '1.88'. Can you explain this answer?
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    A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of 0.03 M KMnO4 solution to reach the end point. Number of moles of Fe2+ present in 250 mL solution is x × 10−2 (consider complete dissolution of FeCl2). The amount of iron present in the sample is y% by weight.(Assume: KMnO4 reacts only with Fe2+ in the solution, Use: Molar mass of iron as 56 g mol−1)Q. The value of x is _______.Correct answer is '1.88'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of 0.03 M KMnO4 solution to reach the end point. Number of moles of Fe2+ present in 250 mL solution is x × 10−2 (consider complete dissolution of FeCl2). The amount of iron present in the sample is y% by weight.(Assume: KMnO4 reacts only with Fe2+ in the solution, Use: Molar mass of iron as 56 g mol−1)Q. The value of x is _______.Correct answer is '1.88'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of 0.03 M KMnO4 solution to reach the end point. Number of moles of Fe2+ present in 250 mL solution is x × 10−2 (consider complete dissolution of FeCl2). The amount of iron present in the sample is y% by weight.(Assume: KMnO4 reacts only with Fe2+ in the solution, Use: Molar mass of iron as 56 g mol−1)Q. The value of x is _______.Correct answer is '1.88'. Can you explain this answer?.
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