Question

Write the empirical formula for at least four ionic compounds that could be formed from the following ions:

1. Fe²⁺,
2. Fe³⁺,
3. SO₄²⁻,
4. CH₃CO²⁻

Answer 1

`FeSO_(4),FeCH_(3)CO,Fe_(2)(SO_(4))_(3),Fe_(2)(CH_(3)CO)_(3)`

Step-by-step explanation:

Empirical formula of ionic compound formed by two ions
`A^(x+)` and
`B^(y-)` is
`A_(y)B_(x)` (for
`x\\eq y`) of AB (for x = y)

The above empirical formula is in accordance with charge neutrality principle

Here each cation (
`Fe^(3+)` and
`Fe^(2+)`) can form two ionic compounds by combining with two given anions (
`SO_(4)^(2-)` and
`CH_(3)CO^(2-)`).

So the four ionic compounds are:
`FeSO_(4),FeCH_(3)CO,Fe_(2)(SO_(4))_(3),Fe_(2)(CH_(3)CO)_(3)`