Asked by anony5
A hydrate of barium chloride has the formula BaCl subscript 2 dot XH subscript 2 O.If a 1.055g sample of the hydrate contains 0.157g H2O, what is the "X" in the formula?
Answers
Answered by
DrBob222
g BaCl2 (without the H2O) = 1.055-0.157 = 0.898
mols BaCl2 = grams/molar mass = ?
mols H2O = grams/molar mass = ?
Now find the ratio of 1 mol BaCl2 to that of H2O. The easy way to do that is to divide the mols BaCl2 by itself (which MAKES it 1.00), then divide the mols H2O by the same BaCl2 number. Round to a whole number and that will be x.
mols BaCl2 = grams/molar mass = ?
mols H2O = grams/molar mass = ?
Now find the ratio of 1 mol BaCl2 to that of H2O. The easy way to do that is to divide the mols BaCl2 by itself (which MAKES it 1.00), then divide the mols H2O by the same BaCl2 number. Round to a whole number and that will be x.
Answered by
anony5
Thanks so much!
Answered by
DrBob222
You should have obtained BaCl2.2H2O
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