Question

Blue vitriol is commonly used in industrial dyeing processes. what is the chemical formula for blue vitriol, whose systematic name is copper(ii) sulfate?

Answer 1

CuSO₄·5H₂O the pentahydrate is the most common form

[Cu(H₂O)₄]SO₄·H₂O → [Cu(H₂O)₄]²⁺ + SO₄²⁻ + H₂O
                                        blue

Answer 2

Answer: The chemical formula of blue vitrol is $CuSO_4$

Explanation:

Blue vitrol is the common name of a compound having chemical name copper (II) sulfate.

This is formed by the combination of copper ions and sulfate ions.

Copper is the 29th element of periodic table having electronic configuration of $[Ar]3d^{10}4s^1$.

To form $Cu^{2+}$ ion, this element will loose 2 electrons.

Sulfate ion is a polyatomic ion having chemical formula of $SO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Hence, the chemical formula for copper(II) sulfate is $CuSO_4$