Answer to Question #178432 in General Chemistry for بشرى

Question

. How many grams of aluminum were used to prepare 20.0 g of potassium alum if the percent yield was 81.5%?

Answer 1

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.