What are the spectator ions in the following complete ionic equation: Ba2+(aq)+2I−(aq)+2Na+(aq)+SO2−4(aq)→BaSO4(s)+2I−(aq)+2Na+(aq). Thank you so much!!!

Answer 1

To find the spectator ions just look at what can be canceled on each side of the equation. Ba2+ cannot.
2I- can.
SO4^2- can not(although you made a typo there in the post).
2Na+ can.
The net ionic equation is
Ba^2+(aq) + SO4^2-(aq) ==> BaSO4(s)
Everything else is a spectator ion.