J.R. S. answered 05/02/18
Tutor
5.0
(145)
Ph.D. University Professor with 10+ years Tutoring Experience
You probably mean (NH4)2SO4 + BaCl2 since I'm not aware of any such compound as NH3SO4
(NH4)2SO4(aq) + BaCl2(aq) ==> 2NH4Cl(aq) + BaSO4(s)