Question

Starting from copper how would you obtain blue vitriol?

Answer 1

Answer:

Copper Sulphate pentahydrate (CuSO4 5H2O) is commonly known as Blue Vitriol. It is obtained in lab by dissolving CuO, Cu(OH)2 or CuCO3 in dil H2SO4. The solution on crystallization gives blue triclinic crystals of CuSO4 5H2O.

Answer 2

Answer:

Blue vitriol can be prepared by the treatment of dilute $H_{2}SO_{4}$  with $Cu,CuO$ and $Cu(OH)_{2}$.

Explanation:

• Blue vitriol has chemical formula Copper Sulphate pentahydrate $(CuSO_{4}.5H_{2}O)$. It is blue colored crystalline solid and soluble in water.

• Applications of blue Vitriol:

1. For electroplating of $Cu$
2. For producing of schweizer’s reagent
3. Utilize as pesticide to control fungal growth.

• Preparation of blue vitriol:

• By the reaction of CuO or Cu(OH)₂ with dilute sulphuric acid H₂SO₄ and on crystallization of solution:

               $CuO +dil. H_{2}SO_{4}$    →  $CuSO_{4}.5H_{2}O} +H_{2}$↑

              $Cu(OH)_{2}+dil. H_{2}SO_{4}$    →   $CuSO_{4}.5H_{2}O} +H_{2}O$

• By the reaction of dilute and hot H₂SO₄ with copper in the presence of air.

               $Cu+dil. H_{2}SO_{4}+O_{2}$    →   $CuSO_{4}.5H_{2}O}+H_{2}O$