Question

What is the color of residue formed when fes04 is heated?Why?

Answer 1

Answer:

On heating Ferrous sulphate crystals lose water and form anhydrous Ferrous sulphate . It is because is a salt

Answer 2

The colour of the residue is white.The 7 H2O molecules give FeSO4 it's green colour. when heated, FeSO4 loses this water of crystalization and it's colour changes from pale green to white