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a 2.4375 g sample containing a mixture of KClO3 + NaCl is heated and undergoes a mass loss of 0.6191g. What percent of KClO3 is in the mixture?

  • Chemistry - ,

    2KClO3>>2KCl + 3O2

    ok, nothing happened to the NaCl. So the change was entirely to the KClO3

    moles O2: .6191g/32= you do it.
    moles KCLO3: same as above, times 2/3

    mass of KClO3: Moles potassium chlorate, times mole mass.

    percent KClO3: massKClO3/2.4375

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