Question

.

Iron forms two ions, Fe²⁺ and Fe³⁺.

(a) What are the formulas for the compounds the two iron ions can form with oxide ion, O²⁻?

Fe²⁺

Fe³⁺

(b) What are the formulas for the compounds the two iron ions can form with chloride ion,

Cl⁻?

Fe²⁺

Fe³⁺

Answer 1

A) When iron reacts with oxide ion ,

first with Fe²⁺ + O₂^{- _}-----------> Fe(I) +O_{2 ,}

Here oxide ion reduces the Fe2+ to Fe(i) and itself is oxidised.,

Fe³⁺ + O₂^{- _}-----------> Fe²⁺ +O₂   

Here oxide ion reduces the Fe3+ to Fe(II) and itself is oxidised.,

B) The iron reacts with chloride ion,

2Fe³⁺ + 2Cl- ------------->2 Fe²⁺ Cl₂

in this reaction Iron III is recuced to Fe 2+ and chloide ions are oxidised to chlorine molcule.

2Fe2⁺ + 2Cl- ------------->2 Fe⁺ + Cl₂

in this reaction Iron II is reduced to Fe (I) and chloide ions are oxidised to chlorine molcule.