When mixing sodium sulfate with barium chloride, what precipitate forms, and write the net ionic equation.

• A. Precipitate: Sodium chloride; Net ionic: Na+ + Cl− → NaCl(s)
• B. Precipitate: Barium sulfate (BaSO4); Net ionic: Ba2+ + SO4^2− → BaSO4(s)
• C. Precipitate: Potassium sulfate; Net ionic: K+ + SO4^2− → K2SO4(s)
• D. Precipitate: Barium nitrate; Net ionic: Ba2+ + NO3− → Ba(NO3)2(s)

Answer: (B)