Question

Formal charge of sulphur atom in H2SO4

Answer 1

S is the central atom, and forms 2 double binds with 2 oxygen atoms. And 1 single bind each with OH. Thus the fornal charge on S is - valence elctrons of s - number of electrons (lone pairs) - number of bonds.

=> 6-0-6

=> 0

Hence formal charge is zero.

Answer 2

Explanation:

Formal charge is defined as the charge assigned to an atom of a molecule.

In $H_{2}SO_{4}$, sulfur is the central atom. Therefore, formula to calculate the formal charge will be as follows.

          Formal charge = Valence electrons - $(l.p + \frac{1}{2} bonded electrons)$

Valence electrons in sulfur are 6 and lone pairs on sulfur are zero. Number of bonded electrons of sulfur are 8.

Therefore, formal charge on sulfur atom will be calculated as follows.

                   Formal charge = Valence electrons - $(l.p + \frac{1}{2} bonded electrons)$

                                             = 6 - $(0+ \frac{1}{2} \times 8)$

                                             = 6 - 4

                                              = 2

Thus, we can conclude that the formal charge on sulfur in $H_{2}SO_{4}$ is +2.