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Molecular weights
Al2(SO4) = 342.15 g/mol for anhydridous salt
AlCl3 = 133.34 g/mol for anhydridous salt
BaCl2 = 208.2324 g/mol for anhydridous salt
BaSO4 = 233.43 g/mol for anhydridous salt
reaction
3*n*BaCl2+n*Al2(SO4)3 = 2*n*AlCl3+3*n*Ba(SO4)
n=113/342.15
m=3*n*(BaCl2)
m=3*(113/342.15)*208.2324
m=206.32g
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