Answer:
b. 2Ag+(aq) + S2-(aq) → Ag2S
Step-by-step explanation:
After balancing the equation, you get
Na2S(aq) + 2AgNO3(aq) → 2NaNO3(aq) + Ag2S(s)
The total Ionic equation is
2Na+(aq) + S2-(aq) + 2Ag+(aq) + 2NO-3 (aq) → 2Na+(aq) + 2NO-3 (aq) + Ag2S(s)
Sodium ions (Na+) and nitrate ions (NO-3) ions ions are present on each side of the ionic equation. So, sodium and nitrate are the spectator ions. On removal of the spectator ions from the total ionic equation, we get the following net ionic equation:
2Ag+(aq) + S2-(aq) → Ag2S