Question

$\rm{2FeSO_4(s)\xrightarrow{\text{Heat}}Fe_2O_3(s)+SO_2(g)+SO_3(g)}$
Let me know about the above equation ​

Answer 1

• Ferrous sulphate crystals(FeSO₄) are green in colour. When these crystals are heated they lose their water of crystallisation molecules and become anhydrous ferrous sulphate and their colour becomes white.

• On further heating, these white coloured anhydrous ferrous sulphate decomposes into ferric oxide(Fe₂O₃), sulphur dioxide(SO₂) & sulphur trioxide(SO₃). This reaction is called decomposition reaction.

• Hence, ferrous sulphate crystals finally became three simpler products upon decomposition - ferric oxide, sulphur dioxide & sulphur trioxide. Ferric oxide obtained here is reddish-brown in colour while the other two are gases. These gases are colourless and are poisonous too.

Reaction for the decomposition process:-

• $\rm{2FeSO_4(s)\xrightarrow{\text{Heat}}Fe_2O_3(s)+SO_2(g)+SO_3(g)}$

Additional Information:

Decomposition reaction:-

• A type of chemical reaction in which a single reactant splits/broke down into a number of simpler products is called a decongestant reaction. All decomposition reactions are endothermic and require energy in the form of heat, light or electricity to occur.

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