This is because sulphate is a thing that just dissolve in the water and changes the colour.
ferrous sulphate when it is heated it changes into red brown color
Lead solutions are usually a greenish, yellowish colour....
Copper (II) sulphate is a salt that is blue.
Copper Sulphate usually is found in a hydrated form (i.e., water molecules are incorporated into the crystals.) Pure copper sulphate is a pale, greenish gray color. The familiar blue color only occurs in hydrates of copper sulphate (i.e., in crystals that incorporate H20 molecules). Heating the blue crystals can drive off the water. It's still called copper sulphate after you do that. For substances like copper sulphate that naturally attract water, the adjective, anhydrous often is used to describe the pure (water free) state. If you heat copper sulphate to a temperature of 650C, it will decompose into something else. http://en.wikipedia.org/wiki/Copper_sulphate
Copper sulfate is a substance, not a change. It can undergo physical and chemical changes.
ferrous sulphate when it is heated it changes into red brown color
The color of crystals will change after heating because of loss of water..
The color of the heptahydrate FeSO4. 7 H2O is green. After thermal dehydration the monohydrate FeSO4.H2O is formed and this is colorless.
Ferrous Sulphate, also known as Iron (II) sulphate or green vitrol is green.
Sulfate/Sulphate dissolved in water is blue in color. That's COPPER sulphate; there are many other sulphates which have many different colours, or are colourless.
green
Copper sulphate's colour is blue.
Blue-Green.
no
manganese sulphate is pale pink colored crystalline powder & it is highly soluble in water
Ferrous sulfate is green in color
faded green in colour