Potassium salts are much more expensive than ammonium salts. Ammonium aluminum alum can often be used interchangeably with potassium aluminum alum. What is the maximum weight of ammonium aluminum alum that can be made from 2.20g of aluminum?
2007-10-25 10:56:05 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Ammonium aluminum alum is NH4Al(SO4)2; let it be called A
Al ===> NH4Al(SO4)2
Atomic weights: N=14 H=1 Al=27 S=32 O=16 NH4Al(SO4)2= 237
2.20gAl x 1molAl/27gAl x 1molA/1molAl x 237gA/1molA = 19.3g alum
2007-10-25 11:09:57 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
Chemical formula of Ammonium aluminum is (NH4)3-Al. 2.20 g of aluminum is .081 mol of aluminum, which corresponds to .0815x3=.244 mol NH4. .244 mol NH4 weighs 4.4 g. Add that weight to the 2.20 g of aluminum and you get 6.6 g as the total weight.
2007-10-25 18:04:01 · answer #2 · answered by Lakers Too Good 4 · 0⤊ 0⤋