Which of the following is the balanced complete ionic equation for the reaction K2SO4(aq) + CaI2(aq) → CaSO4(s) + KI(aq)?

• A. 2K+(aq) + SO4^2-(aq) + Ca^2+(aq) + 2I-(aq) → Ca^2+(aq) + SO4^2-(aq) + 2K+(aq) + 2I-(aq)
• B. 2K+(aq) + SO4^2-(aq) + Ca^2+(aq) + 2I-(aq) → CaSO4(s) + 2K+(aq) + 2I-(aq)
• C. K2SO4(aq) + CaI2(aq) → Ca^2+(aq) + SO4^2-(aq) + 2K+(aq) + 2I-(aq)
• D. K2SO4(aq) + CaI2(aq) → CaSO4(s) + 2KI(aq)

Answer: (B)

Verified step by step guidance

1. Identify the reactants and products in the given chemical equation: K2SO4(aq) + CaI2(aq) → CaSO4(s) + KI(aq).
2. Write the dissociation of the aqueous compounds into their respective ions: K2SO4(aq) dissociates into 2K+(aq) and SO4^2-(aq); CaI2(aq) dissociates into Ca^2+(aq) and 2I-(aq).
3. Write the complete ionic equation by including all the ions from the dissociated reactants: 2K+(aq) + SO4^2-(aq) + Ca^2+(aq) + 2I-(aq) → CaSO4(s) + 2K+(aq) + 2I-(aq).
4. Identify the spectator ions, which are ions that appear unchanged on both sides of the equation. In this case, 2K+(aq) and 2I-(aq) are spectator ions.
5. Write the net ionic equation by removing the spectator ions, leaving only the ions that participate in forming the precipitate: Ca^2+(aq) + SO4^2-(aq) → CaSO4(s).