Q.number 33. Please solve and please balance it
Answers
Explanation:
When ferric sulphate is heated, undergoes thermal decomposition and produces iron (III) oxide and sulphur trioxide.
\mathrm{Fe}_{2}\left(\mathrm{So}_{4}\right) 3 \stackrel{\mathrm{t}^{0} \mathrm{c}}{\rightarrow} \mathrm{Fe}_{2} \mathrm{O}_{3}+3 \mathrm{SO}_{3}Fe
2
(So
4
)3
→
t
0
c
Fe
2
O
3
+3SO
3
This thermal decomposition reaction requires a high temperature of about 500^{\circ} \mathrm{C}500
∘
C to 700^{\circ} \mathrm{C}700
∘
C . The sulphur trioxide further decomposes to give sulphur dioxide.
The gas emitted produces a characteristic smell of burning sulphur. The colour changes from green to white to brown upon heating. Since the gases released like \mathrm{SO}_{2}SO
2
and\mathrm{SO}_{3}SO
3
are highly harmful in nature, care must be taken while heating ferric sulphate.
Answer:
The equation after balancing is:
Fe2(SO4)3 ⇒ Fe2O3 + 3SO3