Potassium Chlorate [KClO3] Molecular Weight Calculation

The molecular weight of Potassium chlorate (KClO3) is 122.5492.

Potassium Chlorate (KClO3) Molecular Weight CalculationPotassium chlorate (KClO3) is an inorganic compound of three elements: Potassium, Chlorine, and Oxygen. The molecular weight of Potassium chlorate is 122.5492 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Potassium, Chlorine 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 chlorate [KClO3] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Potassium chlorate molecule.
From the chemical formula, you will know different atoms and their number in a Potassium chlorate molecule. Chemical formula of Potassium chlorate is KClO3. From the chemical formula of Potassium chlorate, you can find that one molecule of Potassium chlorate has one Potassium (K) atom, one Chlorine (Cl) atom and three 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 
Chlorine (Cl): 35.4527 (Ref: Jlab-ele003)
Atomic weight of Oxygen (O) : 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the molecular weight of Potassium chlorate by adding the total weight of all atoms.

Number of Potassium atoms in Potassium chlorate: 1
Atomic weight of Potassium: 39.0983
Total weight of Potassium atoms in Potassium chlorate: 39.0983 x 1 = 39.0983

Number of Chlorine (Cl) atoms in Potassium chlorate: 1
Atomic weight of Chlorine: 35.4527
Total weight of Manganese atoms in Potassium chlorate: 35.4527 x 1 = 35.4527

Number of Oxygen (O) atoms in Potassium chlorate: 3
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Potassium chlorate: 15.9994 x 3 = 47.9982

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

Molecular weight of Potassium chlorate : 39.0983 (Potassium) + 35.4527 (Chlorine) + 47.9982 (Oxygen) 

So the molecular weight of Potassium chlorate is 122.5492.

Potassium chlorate [KClO3] Molecular Weight Calculation

Molecular weight of Potassium chlorate (KClO3)
Constituent atomsNumber of each atom
Atomic weight
Total weight
Potassium (K)139.098339.0983
Chlorine (Cl)1
35.452735.4527
Oxygen (O)3
15.999447.9982
Molecular weight of Potassium chlorate (K2CO3):
122.5492

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