Question

Write the formulas for the following ionic compounds: (a) copper bromide (containing the Cu+ ion), (b) manganese oxide (containing the Mn3+ ion), (c) mercury iodide (containing the (Hg2)+2 ion), (d) magnesium phosphate (containing the (PO4)^-3 ion).

Answer 1

Answer:The formulas of ionic compounds are:

a)
`CuBr`

b)
`Mn_2O_3`

c)
`Hg_2I_2`

d)
`Mg_3(PO_4)_2`

Step-by-step explanation:

Formulas for the an ionic compounds is determine by:

Criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

(a) Copper bromide :Given that it contains
`Cu^+` ion.

`Cu^++Br^-\rightarrow CuBr`

(b) Manganese oxide : Given that it contains
`Mn^(3+)` ion.

`Mn^(3+)+O^(2-)\rightarrow Mn_2O_3`

(c)Mercury iodide :Given that it contains
`Hg_2^(2+)`

`Hg_2^(2+)+I^-\rightarrow Hg_2I_2`

(d) Magnesium phosphate :Given that it contains
`PO_4^(3-)`

`Mg^(2+)+PO_4^(3-)\rightarrow Mg_3(PO_4)_2`