a mixture containing only bao and cao weighs 2.00 g the oxides are converted to the corresponding mixed sulfates, which weigh 4.00 g . calculate the percent ba and ca in the original mixture . answer
This is a two equation problem which must be solved simultaneously. The equations are set up this way.
Let X = mass Ba
Let Y = mass Ca
mm stands for molar mass
am stands for atomic mass
------------------------------------
eqn 1..........(Y*mm CaO/am Ca) + (X,*mm BaO/am Ba) = 2.00 g
eqn 2..........(X*mm BaSO4/am Ba) + (Y*mm CaSO4/am Ca) = 4.00
Solve for X and Y = grams Ba(or X) and grams Ca(or Y)
Then % Ca = (grams Ca/mass sample)*100 = ?
and %Ba + (grams Ba/mass sample)*100 = ?
Post your work if you get stuck.