Answer : The reaction that occurs when we mix the aqueous solutions of Lithium phosphate and Magnesium nitrate is as follows :-
[tex]2LiPO_{4} + Mg(NO_{3}) _{2} ----\ \textgreater \ Mg _{3} (PO_{4} ) _{2} + 2 LiNO_{3}[/tex]
A simple displacement reaction occurs in the above reaction with the net ionic equation given below :-
[tex]2(PO _{4} ) ^{3-} _{(aq.)} + 3 Mg ^{+2} _{(aq.)} ----\ \textgreater \ Mg _{3} (PO _{4}) _{2 _{(s)} } [/tex]
