Copper Sulphate Crystals and Water of Crystallization

What is the initial color change observed when copper sulphate crystals are heated?

• Blue to green

• Blue to white

• White to blue

• Green to blue

What happens to copper sulphate pentahydrate when it is heated?

• It loses water of crystallization

• It gains water of crystallization

• It becomes copper nitrate

• It turns into copper oxide

What is the color of anhydrous copper sulphate?

• Blue

• White

• Green

• Red

What happens to anhydrous copper sulphate when exposed to air?

• It turns red

• It absorbs moisture and turns blue

• It remains white

• It evaporates

What type of chemical change is demonstrated by the copper sulphate experiment?

• Irreversible chemical change

• Physical change

• Reversible chemical change

• No change