# Barium Hydroxide [Ba(OH)2] Molecular Weight Calculation

The molecular weight of Barium hydroxide [Ba(OH)2] is 171.3418.

Barium hydroxide [Ba(OH)2] is an inorganic compound of three elements: Barium, Oxygen, and Hydrogen. The molecular weight of Barium hydroxide is 171.3418 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Barium, Oxygen, and Hydrogen.

CALCULATION PROCEDURE: Barium Hydroxide [Ba(OH)2] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Barium hydroxide molecule.
From the chemical formula, you will know different atoms and their number in a Barium hydroxide molecule. The chemical formula of Barium hydroxide is Ba(OH)2. From the chemical formula, you can find that one molecule of Barium hydroxide has one Barium (Ba) atom, two Oxygen (O) atoms, and two Hydrogen (H) atoms.

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

Atomic weight of Barium (Ba): 137.327 (Ref: Pubchem-56, Ciaaw-barium)
Atomic
weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)
Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1

Step 3: Calculate the molecular weight of Barium hydroxide by adding the total weight of all atoms.

Number of Barium atoms in Barium hydroxide: 1
Atomic weight of Barium: 137.327
Total weight of Barium atoms in Barium hydroxide: 137.327 x 1 = 137.327

Number of Oxygen atoms in Barium hydroxide: 2
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Barium hydroxide: 15.9994 x 2 = 31.9988

Number of Hydrogen atoms in Barium hydroxide: 2
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Barium hydroxide: 1.008 x 2 = 2.016

Step 4: Calculate the molecular weight of Barium hydroxide by adding up the total weight of all atoms.

Molecular weight of Barium hydroxide [Ba(OH)2]: 137.327 (Barium) + 31.9988 (Oxygen) + 2.016 (Hydrogen)= 171.3418

So the molecular weight of Barium hydroxide is 171.3418.

Barium hydroxide [Ba(OH)2] Molecular Weight Calculation

## REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml
• Pubchem-56: https://pubchem.ncbi.nlm.nih.gov/element/56
• Ciaaw-barium: https://www.ciaaw.org/barium.htm
• Jlab-ele056: https://education.jlab.org/itselemental/ele056.html
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html