The molecular weight of Sodium sulfate (Na₂SO₄) is 142.04313856.

Sodium sulfate (Na₂SO₄) is an inorganic compound of three elements: Sodium, Sulfur, and Oxygen. The molecular weight of Sodium sulfate is 142.04313856 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Sodium sulfate [Na₂SO₄] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Sodium sulfate molecule.
You will know different atoms and their number in a Sodium sulfate molecule from the chemical formula. The chemical formula of Sodium sulfate is Na₂SO₄. From the chemical formula, you can find that one molecule of Sodium sulfate has two Sodium (Na) 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 Sodium (Na): 22.98976928 (Ref: Ciaaw-sodium)
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 Sodium sulfate by adding the total weight of all atoms.

Number of Sodium atoms in Sodium sulfate: 2
Atomic weight of Sodium: 22.98976928
Total weight of Sodium atoms in Sodium sulfate: 22.98976928 x 2 = 45.97953856

Number of Sulfur (S) atoms in Sodium sulfate: 1
Atomic weight of Sulfur: 32.066
Total weight of Sulfur atoms in Sodium sulfate: 32.066 x 1 = 32.066

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

Step 4: Calculate the molecular weight of Sodium sulfate by adding up the total weight of all atoms.

Molecular weight of Sodium sulfate : 45.97953856 (Sodium) + 32.066 (Sulfur) + 63.9976 (Oxygen) = 142.04313856

So the molecular weight of Sodium sulfate is 142.04313856.

Sodium sulfate [Na₂SO₄] Molecular Weight Calculation

REFERENCES:

• Ciaaw-sodium : https://www.ciaaw.org/sodium.htm
• Jlab-ele016: https://education.jlab.org/itselemental/ele016.html
  
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html

See also:

• Hydrogen chloride molecular weight calculation