Question

(a) What is the colour of ferrous sulphate crystals? How does this colour change after heating?
​(b) Name the products formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change? Write chemical equation of the reaction.

Answer 1

Answer:On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed. So their colour changes from light green to white. On furtherheating, anhydrous ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3).

Expl

Answer 2

Explanation:

a)Upon heating, the iron sulphate crystals lose water($H_{2} O$) and produce anhydrous iron sulfate ($FeSO_{4}$). Their color varies from light green into white. After further heating, the anhydrous iron sulphate produces iron oxide $(Fe_{2} O_{3} )$, sulphur trioxide $(SO_{3} )$ and sulphur dioxide ($SO_{2}$)

b)The products made with very hot iron sulphate crystals are iron oxide, sulphur trioxide ,sulphur dioxide.

$2 FeSO_{4} (g) -> Fe_{2} O_{3} + SO _{2} + SO_{3}$

This is a type of decomposition reaction (thermal decomposition).

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