Question

a.what is the colour of the Residue ?
b.why do the crystals change colour ?
c.what special name do you give to the Residue ?
d.what change will you observe when the solid Residue is treated with
1.liquid p ?
2. pure distilled water ?
e.state with reason what kind of change has taken place physical or chemical when blue vitrolles are strongly heated ?​

Answer 1

Answer:

a. blue colour

b. Because they were changed into pure substance of copper sulphate.

c. Pure blue crystals of copper

d. The liquid P is evaporated and has converted into pure form of crystals.

c. It was both a physical and a chemical change because it was first in liquid form and then changed into solids. I also had some chemical changes during the process.

Answer 2

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