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Answer to Question #178432 in General Chemistry for بشرى
Question #178432
. How many grams of aluminum were used to prepare 20.0 g of potassium alum if the percent yield was 81.5%?
Expert's answer
Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound: the double sulfate of potassium and aluminium, with chemical formula KAl(SO4)2.
Al > KAl(SO4)2
27 -----258
x---------20/0.815
x= 2.568 g.
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