[CHM 181] Alum Theoretical Yield Calculation

[Andrew J. Pounds]

I told you in class on Friday that I would be sending out some help for 
the Alum lab.   As we discussed in class the relationship between 
Aluminum to the Alum (potassium aluminum sulfate dodecahydrate) is 1:1 
and aluminum is the limiting reactant.

For that reason to compute the theoretical yield of your alum you would 
divide the mass of aluminum you massed by the molar mass of aluminum 
(26.98 g/mol) and then multiply that by the molar mass of the alum 
(474.4 g/mol).

For example, if you massed out 0.47 grams of aluminum, your theoretical 
yield of alum would be.

(0.47 g Al) / (26.98 g Al/mol) * (474.4 g Alum/mol) = 8.26 grams Alum

The number of sig figs that you got from the mass of aluminum should 
determine the number of sig figs in your final result.

-- 
*/Andrew J. Pounds, Ph.D./*
/Professor of Chemistry and Computer Science/
/Director of the Computational Science Program/
/Mercer University, Macon, GA 31207 (478) 301-5627/
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