In the reaction, BaCl2(aq)+K2SO4(aq)→BaSO4(s)+2KCl(aq), which is not a spectator ion?
In the reaction Zn +2H+ +2Cl−⟶Zn+2+ 2Cl−+H2 the spectator ion
Zn+2H++2Cl−−−−−−−−>Zn2++2Cl−+H2