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Posted by on Friday, July 26, 2013 at 11:56pm.

ou weigh out Potassium Permanganate,
Mass of KMnO4 (MW=158.034).......... 0.1569 g
You dissolve it completely in water.......... 46.00 mL
(a) Molarity of MnO4- solution........................... ________________ M
You pipet out your UNKNOWN............. 0.90 mL
You acidify and titrate it with your KMnO4 solution until the permanganate color persists.
Volume of permanganate solution.......... 14.61 mL
(b) Molarity of the HOOH in the UNKNOWN...................................._____________ M

  • chemistry - , Saturday, July 27, 2013 at 12:27am

    mols KMnO4 = grams/molar mass
    M = mols/L soln

    Write and balance the equation for KMnO4 + HOOH.
    In the titration, mols KMnO4 = M x L = ?
    Convert mols KMnO4 to mols HOOH using the coefficients in the balanced equation.
    Then M HOOH = mols HOOH/L HOOH.

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