Question

a green coloured hydrated metallic salt on heating loses its water of crystallization molecules and gives the smell of burning sulphur. indentify the Salt and write the equation. what type of equation it?​

Answer 1

Answer:

Explanation:

Green vitriol, FeSO4.7H2O loses its water of crystallization on heating and gives smell of burning sulphur.

2FeSO₄

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Answer 2

Answer :

$\dagger\:\rm{Salt=FeSO_4.7H_2O\:(hydrated\:ferrous\:sulphate).}$

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$\dagger$ Chemical equations involved:-

$\bold{1.}\:\rm{FeSO_4.7H_2O(s)\xrightarrow{\text{heat}}FeSO_4(s)+7H_2O(l)}$

• Hydrated ferrous sulphate decomposes to from ferrous sulphate and water upon heating. This means, the salt lost its water of crystallisation molecules.

$\bold{2.}\:\rm{2FeSO_4(s)\xrightarrow{\text{heat}}Fe_2O_3(s)+SO_2(g)+SO_3(g)}$

• Upon further heating, ferrous sulphate decomposes again to form ferric oxide, sulphur dioxide & sulphur trioxide. These gases are responsible for the smell of burning sulphur.

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$\dagger$ The above reactions are examples of a decomposition reaction.

• Decomposition reaction: A reaction in which a single reactant breaks down/splits into a number of simpler products.