The final product will be H3PO4 because the oxidation state will remain unchanged in sequence of the reaction. PCl5
H2O
──▶
POCl5
H2O
───▶
H3PO4 H3PO4 has three P−OH bonds and no P−H bond.
The hydrogen atoms in O—H bonds are ionisable in ortho phosphoric acid. The P—H bonds are non-ionisable. Hence, number of non-ionisable bond in H3PO4 is zero.