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Chemistry urgent help !!!

  • 01-03-2015 4:30pm
    #1
    Dominique321
    Registered Users, Registered Users 2 Posts: 15 ✭


    Benzoic acid was prepared in a school laboratory by reacting a saturated solution of alkaline potassium manganate(VII) containing 3g of KMnO4 with 1cm3 of phenylmethanol. The balanced equation for the reaction is
    3C6H5CH2OH+4KMnO4
    > 3C6H5COOH+4MnO2+H2O+4KOH
    0.65g of benzoic acid were formed. The density of phenylmethanol is 1.04g/cm3

    (a) show that phenylmethanol is the limiting reactant
    (B) calculate the percentage yield of benzoic acid


Comments

  • #2
    DepoProvera
    Registered Users, Registered Users 2 Posts: 404 ✭✭DepoProvera


    Find the moles of each of the reactants and apply the stoichiometric ratio to them.. Which is the smaller value will be the limiting reactant... Then use the moles of limiting reactant to get the theoretical moles of benzoic acid (using the ratio again).. then percentage yield is actual/theoreticalx100


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