Potassium Sulfate [K2SO4] Molecular Weight Calculation

The molecular weight of Potassium sulfate (K2SO4) is 174.2602.

Potassium Sulfate (K2SO4) Molecular Weight CalculationPotassium sulfate (K2SO4) is an inorganic compound of three elements: Potassium, Sulfur, and Oxygen. The molecular weight of Potassium sulfate is 174.2602 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Potassium, Sulfur and Oxygen.

To calculate molecular weight of any compound, the first step is to know the constituent elements (atoms) and their number in that particular compound. Then calculate the total atomic weight of each element by multiplying its atomic weight by its number. The sum of total atomic weight of all constituent elements will be the molecular weight of the compound. Note that the value of atomic weight may differ from different sources.

CALCULATION PROCEDURE: Potassium sulfate [K2SO4] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Potassium sulfate molecule.
From the chemical formula, you will know different atoms and their number in a Potassium sulfate molecule. Chemical formula of Potassium sulfate is K2SO4. From the chemical formula of Potassium sulfate, you can find that one molecule of Potassium sulfate has two Potassium (K) atoms, one Sulfur (S) atom and four Oxygen (O) atoms.

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

Atomic weight of Potassium (K): 39.0983 (Ref: Ciaaw-potassium)
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 Potassium sulfate by adding the total weight of all atoms.

Number of Potassium atoms in Potassium sulfate: 2
Atomic weight of Potassium: 39.0983
Total weight of Potassium atoms in Potassium sulfate: 39.0983 x 2 = 78.1966

Number of Sulfur (N) atoms in Potassium sulfate: 1
Atomic weight of Sulfur: 32.066
Total weight of Manganese atoms in Potassium sulfate: 32.066 x 1 = 32.066

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

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

Molecular weight of Potassium sulfate : 78.1966 (Potassium) + 32.066 (Sulfur) + 63.9976 (Oxygen) 

So the molecular weight of Potassium sulfate is 174.2602.

Potassium sulfate [K2SO4] Molecular Weight Calculation

Molecular weight of Potassium sulfate (K2SO4)
Constituent atomsNumber of each atom
Atomic weight
Total weight
Potassium (K)239.098378.1966
Sulfur (S)1
32.06632.066
Oxygen (O)4
15.999463.9976
Molecular weight of Potassium sulfate (K2SO4):
174.2602

REFERENCES:

See also:

Was this post helpful?

Author: admin

Leave a Reply

Your email address will not be published. Required fields are marked *