What is the net ionic equation for the reaction between aqueous solutions of Na3PO4 and CuSO4?
a) 3Cu2+ + 2PO43- --> Cu3(PO4)2
b) 2Na+ + SO42- --> Na2SO4
c) Cu2+ + PO43- --> CuPO4
d) No reaction occurs since no precipitate is formed.
Answer: a) 3Cu2+ + 2PO43- --> Cu3(PO4)2