A molecule of Sulphuric Acid, H2SO4,consists of two atoms of hydrogen, one atom of sulphur and four atoms of oxygen

Sulphuric acid is a colourless viscous corrosive oily liquid, which has

• Melting Point : 10.3 degC
• Boiling Point : 338 degC
• Formula weight 98.08
• Specific gravity or density 1.94
• Flash point none

Sulphuric acid is the strong acid produced by dissolving sulphur trioxide in water.

SO3 + H2O ==> H2SO4

The Strength of Acids is determined by the degree to which they are ionised in aqueous solution. 
For example, Sulphuric Acid, H2SO4, which is a strong acid is fully dissociated, and all the displaceable hydrogen in the acid is present in solution as Hydrogen Ion, H(+).

H2SO4 ==> H(+) + SO4 100% as H(+)

In contrast, the weak acids ethanoic acid, CH3COOH, is partially ionised in solution, and only approximately 5% of the displaceable Hydrogen in the acid is present in solution as hydrogen ion, H(+).

CH3COOH ==> H(+) + CH3COO(-) 5% as H(+)