One question, do you know the solubility rules?
Aside, what school do you attend? what school has already done so much?
Now, the equation is:
Let's see...
PCl5 + 4H2O + H3PO4 + 5HCl
Break it down...
P5+ + Cl- + 4H+ + 4O-2 + H1 + PO43- + 5H+ + 5Cl-
And we get... what do we get?