Barium nitrate mixed with potassium phosphate?

Answer 1

The solubility of barium is somewhat mixed---it can be soluble with notoriously insoluble things like hydroxide, and it can be insoluble with other somewhat insoluble anions like sulfate. However, chromate is one anion that is almost always insoluble unless it is paired with an alkali metal. So mixing these two compounds will give you a BaCrO4 precipitate.

Answer 2

If both are in solutions, barium sulfate would precipitate out of the solution - unless if the barium chloride solution is dilute enough that only a small amount of barium sulfate will form, thus remaining soluble in the solution. The remaining sulfate will remain in the solution as wellas sodium and chloride.

Answer 3

Ba(NO3)2(aq) +K2CO3(aq)-->BaCO3 (s)(aq) +2KNO3(aq)

Answer 4

2K3PO4 + 3Ba(NO3)2 -----> 6KNO3 + Ba3(PO4)2

Answer 5

no reaction.