Question

A salt contains two atoms of iron, three atoms of sulphur and twelve atoms of oxygen. Identify the corresponding acid and base from which it is formed.

• A. $H_{2}S{O}_4,Fe(OH{)}_2$
• B. $H_{2}S{O}_3,Fe(OH{)}_2$
• C. $H_{2}S{O}_3,Fe(OH{)}_3$
• D. $H_{2}S{O}_4,Fe(OH{)}_3$

Answer 1

The correct option is D $H_{2}S{O}_4,Fe(OH{)}_3$

$F{e}_2(S{O}_4{)}_3$ is the salt formed from $Fe(OH{)}_3$ and $H_{2}S{O}_4$. The balanced chemical equation can be written as:
$2Fe(OH{)}_3+3H_{2}S{O}_4\to F{e}_2(S{O}_4{)}_3+6H_{2}O$