011-40705070  or  
Call me
Download our Mobile App
Select Board & Class
  • Select Board
  • Select Class

what is the colour of feso4.7h2o crystals ? how does this colour changes upon heating ?

give balanced chemical equation for the changes ?

Asked by Sai Abhiram (student) , on 27/5/13

Become Expert
Score more in Science
Start Now with Video Lessons, Sample Papers, Revision Notes & more for Class-X - CBSE 


Ferrous sulphate is blue-green in colour. On being heated, it loses water of crystallisation and is converted to anhydrous ferrous sulphate. The anhydrous ferrous sulphate on further heating decomposes to ferric oxide, sulphur dioxide and sulphur trioxide. Ferric oxide is reddish brown in colour. This is an example of decomposition reaction. Following is the equation for the reaction


Posted by Kirti Gogia (student) on 29/5/13

This conversation is already closed by Expert

More Answers


2FeSO4(s)------Heat----> Fe2O3(s) + SO2(g) + SO3(g)

The colour of FeSO4 crystals is pale green.When it is heated, FeSO4.7H2O first loses its water of crystallisation. These pale green crystals then decompose to form Ferric Oxide, Sulphur dioxide and sulphur trioxide. These gases escape inthe atmosphere, but the ferric oxide remains and shows the brown colour crystals.

Posted by Raksha Undefined (student) on 27/5/12

Ask a QuestionHave a doubt? Ask our expert and get quick answers.
Show me more questions