Question

Molar mass of ${{H}_{2}}S{{O}_{4}}$ is :

Answer 1

Hint: Split the given condensed form of the compound. By doing this you can identify the different atoms present in the compound. Now write the mass of each atom and the total sum of the masses will be the resultant molar mass.


Complete step-by-step answer:
Sulfuric acid is a mineral acid with the element composition of sulphur, oxygen and hydrogen. It is also called the oil of vitriol. It is highly corrosive in nature towards other materials including the human skin.
Sulphuric acid exists as a colourless viscous liquid having no odour at room temperature. It is synthesised in reactions that are extremely exothermic i.e. release a lot of energy.
We will now break down the formula of sulphuric acid to identify constituent atoms.
One mole of sulphuric acid contains,
- 2 moles of hydrogen atom ( Molar mass = 1)
- 1 mole of sulphur atom ( Molar mass = 32)
- 4 moles of oxygen atom ( Molar mass = 16)
The molar mass of ${{H}_{2}}S{{O}_{4}}$ is the total sum of the mass of individual atoms.
Molar mass = (1 x 2) + (1 x 32) + (4 x 16) = 2 + 32 + 64 = 98 g


Therefore, the molar mass of ${{H}_{2}}S{{O}_{4}}$ is 98 g.


Note: Sulphuric acid at low concentrations is used as an acid to release hydrogen ions i.e. release of protons. However, at high concentrations, sulphuric acid is used as a dehydrating agent. It is mainly used in organic reactions to convert alkanes to alkenes.