Question

&
A metal forms a chloride with the formula MCl2, formula of phosphoric acid is H3PO4. Formula of
the phosphate of the metal is
a) M3PO4
b) MPO4
c) M3 (PO3)2 d) M2PO4

Answer 1

Answer:

I got this : M3(PO4)2

Explanation:

Answer 2

Answer:

The chemical formula of phosphate of metal would be M₃(PO₄)₂.

Explanation:

• Given Chloride of metal has formula MCl₂

        We know that the charge on chloride ion is -1.

        Therefore by using criss cross method,  the charge on metal M will    

         be +2.  The metal ion is written as $M^{2+}$

        Now, the charge on phosphate ion $PO^{3-}_{4}$ of $H_{3}PO_{4}$ is -3

• Apply criss cross method, to find the formula:

       The charge on M will become subscript of of phosphate ion and  

        charge on $PO^{3-}_{4}$ becomes subscript of M.  

Therefore, Formula of the phosphate of the metal = M₃(PO₄)₂