Question

What is the correct formula for the compound iron(lll) carbonate? (a) FeCO3 (b) Fe3CO3 (c) Fe2CO3 (d) Fe2(CO3)3 (e)Fe3(CO3)2

Answer 1

Answer: The correct answer is Option d.

Step-by-step explanation:

We are given an ionic compound named as iron (III) carbonate.

Iron is the 26th element of periodic table having electronic configuration of
`[Ar]3d^64s^2`.

This element will loose 3 electrons to form
`Fe^(3+)` ion.

Carbonate ion is a polyatomic ion having chemical formula of
`CO_3^(2-)`

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.

So, the chemical formula for the given compound is
`Fe_2(CO_3)_3`

Thus, the correct answer is Option d.