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    Marleycc's Avatar
    Marleycc Posts: 1, Reputation: 1
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    #1

    Oct 21, 2010, 09:39 PM
    Stoichiometry HELP
    If 28.93 mL of a potassium permanganate solution was used to titrate 25.00 mL of a sodium oxalate soution made by dissolving 1.0423 g of sodium oxalate in 250.00 mL of water, calculate the molarity of potassium permanganate
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 21, 2010, 10:09 PM

    1. Find the number of moles of sodium oxalate in 25 mL of solution used for titration.

    You have the mass of sodium oxalate. Find the number of moles.
    This mass is contained in 250 mL. Find the number of moles that 25 mL of this solution is used.

    2. Write the equation for the reaction. Then, find the mole ratio to know how many moles of permanganate react with a mole of oxalate.

    3. Thus find the number of moles of permanganate present in 28.93 mL of solution.

    4. Find its concentration, that is the number of moles of potassium permanganate in 1000 mL of solution.

    I hope it helps! :)
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