The molecular weight of Sodium sulfate (Na_{2}SO_{4}) is 142.04313856.

Sodium sulfate (Na_{2}SO_{4}) 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 [Na**_{2}SO_{4}] Molecular Weight Calculation

_{2}SO

_{4}] 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 Na

_{2}SO

_{4}. 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 [Na_{2}SO_{4}] Molecular Weight Calculation

Molecular weight of Sodium sulfate (Na_{2}SO_{4}) | |||

Constituent atoms | Number of each atom | Atomic weight | Total weight |

Sodium (Na) | 2 | 22.98976928 | 45.97953856 |

Sulfur (S) | 1 | 32.066 | 32.066 |

Oxygen (O) | 4 | 15.9994 | 63.9976 |

Molecular weight of Sodium sulfate (Na_{2}SO_{4}): | 142.04313856 |

## 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