Sulfuric Acid [H2SO4] Molecular Weight Calculation

The molecular weight of Sulfuric acid (H2SO4) is 98.0796.

Sulfuric acid (H2SO4) Molecular Weight CalculationSulfuric acid (H2SO4) is an inorganic compound of three elements: Hydrogen, Sulfur, and Oxygen. The molecular weight of Sulfuric acid is 98.0796 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Hydrogen, Sulfur, and Oxygen.

CALCULATION PROCEDURE: Sulfuric acid [H2SO4] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Sulfuric acid molecule.
You will know different atoms and their number in a Sulfuric acid molecule from the chemical formula. The chemical formula of Sulfuric acid is H2SO4. From the chemical formula, you can find that one molecule of Sulfuric acid has two Hydrogen (H) atoms, one Sulfur (S) atom, and four Oxygen (O) atoms.

Step 2: Find out the atomic weights of each atom (from the periodic table).

Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1)
Atomic weight of Sulfur (S): 32.066 (Ref: Jlab-ele016)
Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the molecular weight of Sulfuric acid by adding the total weight of all atoms.

Number of Hydrogen atoms in Sulfuric acid: 2
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Sulfuric acid: 1.008 x 2 = 2.016

Number of Sulfur (S) atoms in Sulfuric acid: 1
Atomic weight of Sulfur: 32.066
Total weight of Manganese atoms in Sulfuric acid: 32.066 x 1 = 32.066

Number of Oxygen (O) atoms in Sulfuric acid: 4
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Sulfuric acid: 15.9994 x 4 = 63.9976

Step 4: Calculate the molecular weight of Sulfuric acid by adding up the total weight of all atoms.

Molecular weight of Sulfuric acid : 2.016 (Hydrogen) + 32.066 (Sulfur) + 63.9976 (Oxygen) 

So the molecular weight of Sulfuric acid is 98.0796.

Sulfuric acid [H2SO4] Molecular Weight Calculation

Molecular weight of Sulfuric acid (H2SO4)
Constituent atomsNumber of each atom
Atomic weight
Total weight
Hydrogen (H)21.0082.016
Sulfur (S)1
32.06632.066
Oxygen (O)4
15.999463.9976
Molecular weight of Sulfuric acid (H2SO4):
98.0796

REFERENCES:

  • Lanl-1: https://periodic.lanl.gov/1.shtml 
  • Jlab-ele016: https://education.jlab.org/itselemental/ele016.html
  • Jlab-ele008: https://education.jlab.org/itselemental/ele008.html

See also:

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