University of Belize


5. A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant.

a. Calculate the mass, in grams, of Na2SO4 in the mixture.
b. Calculate the mass, in grams, of BaCl2•2H2O in the mixture.
c. What is the percentage of Na2SO4 and BaCl2•2H2O in the salt mixture?

asked by sarah
  1. a. Write the equation and balance it.
    mols BaSO4 = grams/molar mass
    Using the coefficients in the balanced equation, convert mols BaSO4 to mols Na2SO4.
    Now convert mols Na2SO4 to g. g = mols x molar mass.

    b. 0.500g - mass Na2SO4 = g BaCl2.2H2O

    c. %Na2SO4 = (g Na2SO4/0.500)*100 = ?
    %BaCl2.2H2O = 100% - % Na2SO4.

    posted by DrBob222
  2. 5. A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant.

    a. Calculate the mass, in grams, of Na2SO4 in the mixture.
    b. Calculate the mass, in grams, of BaCl2•2H2O in the mixture.
    c. What is the percentage of Na2SO4 and BaCl2•2H2O in the salt mixture?

    posted by Nisha

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