Posted by sammy on Sunday, March 7, 2010 at 4:50pm.
Write and balance the equation.
2Fe + 6HCl ==> 2FeCl3 + 3H2
Convert 8.85 g Fe to moles. moles = grams/molar mass.
Using the coefficients in the balanced equation, convert moles Fe to moles H2.
Now convert moles H2 to grams. grams = moles H2 x molar mass H2. This is the theoretical yield.
The above works most simple (not limiting reagent) stoichiometry problems. Print and save this for future reference.
%yield = (actual yield/theoretical yield)*100 = ??
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