Question

What are the spectator ions in the equation 2Na+(aq)+SO2−4(aq)+Ba2+(aq)+2Cl−(aq)→BaSO4(s)+2Na+(aq)+2Cl−(aq)?

Answer 1

by subtracting the common reagent

spectator ions will be given out as

Ba^2+SO^2→BaSO4(s)↓