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(a) What is the colour of ferrous sulpha...

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

Text Solution

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(i) The colour of ferrous sulphate crystals is green. On heating, `FeSO_(4).7H_(2)O` first decomposes to form anhydrous ferrous sulphate `(FeSO_(4))` which is white in colour.
(ii) The products formed on strongly heating ferrous sulphate crystals are ferric oxide, sulphur dioxide and sulphur trioxide.
`underset("Greenish-blue")(2FeSO_(4)(s))overset("Heat")rarrunderset("Brown")(Fe_(2)O_(3)(s))+SO_(2)(g)+SO_(3)(g)`
This is a type of decomposition reaction (thermal decomposition).
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