Question

what are the observations when ferrous sulphate crystals are heated Give reaction

Answer 1

Fe2SO4_>(heated) 2Fe+SO4

Answer 2

Answer:

1) Color of ferrous sulfate changes from light green to white

2) Smell of burning sulfur is evolved

For the reaction, see explanation.

Explanation:

1) When ferrous sulfate (FeSO₄.7H₂O) crystals are heated in dry test tube, their color changes from light green to while and they lose their water of crystallization to become anhydrous ferrous sulfate (FeSO₄).

2) On further heating, the anhydrous ferrous sulfate decomposes into ferric oxide (Fe₂O₃), sulfur dioxide (SO₂) and sulfur trioxide (SO₃). The following reaction takes place:

FeSO₄ + Heat = Fe₂O₃ + SO₂ + SO₃

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