Question

write balanced equations for a coloured Residue from a coloured salt​

Answer 1

Answer:

The green colour substance is Ferrous sulphate.

When ferrous sulphate is heated strongly, it decomposes to form ferric oxide, sulphur dioxide and sulphur trioxide : 

    2FeSO4(s)        −→heat Fe2O3(s)         +SO2(g)            + SO3(g)Ferrous sulphate       Ferric Oxide       Sulphur              Sulphur(Green Colour)         (Brown Colour)     dioxide              trioxide

This is a decomposition reaction since one substance is splitting up into three substances.  In this reaction , the green colour of ferrous sulphate changes to brown due to the formation of ferric oxide . A smell of burning sulphur is obtained due to the the formation of sulphur dioxide.

Hope it helps.....pls mark brainliest........

Answer 2

Answer:

on heating cuco3 is green in colour on heating that substance we get this reaction cuso4 cuo + co2.

in this cuo is a black colour substance that is a residue co2 a colourless gas thanks for asking