Question

$2{\text{Fe}}_2{\text{O}}_3.3{\text{H}}_2\text{O(s)}\stackrel{Calcination}{\to }\text{A}+3{\text{H}}_2\text{O(l)}$
Find out $\text{A}$:

• A. $2\text{FeO}$
• B. $2{\text{Fe}}_3{\text{O}}_4$
• C. $2{\text{Fe}}_2{\text{O}}_3$
• D. $\text{FeO}.{\text{FeCO}}_3$

Answer 1

The correct option is C $2{\text{Fe}}_2{\text{O}}_3$

Calcination is a process in which the ore is heated strongly in the absence of air to remove volatile impurities. It thermally decomposes the carbonate. When the hydrated ferrous salt is calcinated it forms ferric oxide and water. The reaction takes place as follows:

$2{\text{Fe}}_2{\text{O}}_3.3{\text{H}}_2\text{O(s)}\stackrel{Calcination}{\to }2{\text{Fe}}_2{\text{O}}_3\text{(s)}+3{\text{H}}_2\text{O(l)}$