Question dealing with chemistry?

for each set of ionic compounds, switch the pairing of the cations and anions (AgNO3 + KCl => AgCl + KNO3) and find out if the new compounds are soluble. AGCl is not, potium salts are mostly all soluble. i would be surprised if NiCl2 was soluble, barium sulfate might be i don't know off the top of my head, ammonium chloride is probably soluble, calcium phosphate may or may not be. if in any of the ions are aq. on both sides of the equation, you can omit them entirely (hence the net equation)