Give the balanced net ionic equations with states of matter indicated for the process taking place when the named aqueous solutions are mixed, and indicate the type of reaction if any by the following abbreviations: precipitation, P; oxidation reduction, X; Bronsted acid-basie, N; no reaction, NR. Take into account possible hydrolysis prior to mixing.
Na2S + NH4Cl
Na2S + BaCl2
Na2SO4 + NH4Cl
Na2SO4 + BaCl2