The mixing of barium chloride and sodium sulfate is a precipitate reaction. This reaction generates barium sulfide and sodium chloride. Which best describes this reaction? Barium chloride and sodium sulfate are solids, and barium sulfide or sodium chloride must be a liquid. All of the materials are liquids. All of the materials are solids. Barium chloride and sodium sulfate are liquids, and barium sulfide or sodium chloride must be a solid.