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How to Find the Molar Mass of Barium Hydroxide?

Introduction

The number of grams of an element in one mole of that element is called its molar mass. The molar mass of all elements known so far is given in the periodic table. It is referred to as atomic mass in the case of atoms and denoted by Z.

 

The molar mass of a compound is calculated by adding the atomic mass of each atom present in the compound. If there are two atoms of the same type present in a compound then the molar of that atom would be multiplied by two.

 

The molar mass of a compound is used to carry out different calculations so it is important to memorize the atomic masses of different atoms.

Here in this article, we would calculate the molar mass of barium hydroxide and you’ll come to know in detail about the usage of barium hydroxide.

Steps to Calculate Molar Mass

The following are three easy steps to calculate the molar mass of a compound

  • Note the atomic mass of each atom present in the compound.
  • Multiply the number of each atom to its atomic mass.
  • Now add all the entities to get the molar mass of that compound.

The Molar Mass of Barium Hydroxide

The molar mass of barium hydroxide is given in the literature as 171.34 g/mol. The unit of molar mass is grams per mole because it is the number of grams present in one mole. Let us calculate the molar mass of barium hydroxide

The formula of barium hydroxide is Ba(OH)2 which means it contains one atom of barium metal and two atoms of oxygen and hydrogen respectively. The atomic mass of barium, oxygen, and hydrogen is 137.33, 16.00, and 1.01 respectively. Now calculate the answer.

Ba(OH)2 = 137.33 + (16.00 + 1.01) x 2
Ba(OH)2 = 137.33 + 32 + 2.02
Ba(OH)2 = 171.34 g/mol.

The molar of any compound can also be calculated using an online mass calculator. These calculators are free to use. You just enter the molecular formula or the name of the compound and the calculator tells you the molar mass of that compound.

Importance of Molar Mass

The molar mass of a compound is very important. When working with a specific compound, one must know its molar mass while using different concentrations of it.

 

It is used in unit conversions of grams to moles or moles to grams. Molar mass is also important while preparing the concentration solutions of a certain compound. One can calculate the number of moles of a compound in a certain given amount.

Example for Moles Conversion

Calculate the number of moles in 75 grams of sucrose (C12 H22 O11 ).

Formula for calculation of number of moles

Number of moles = mass / molar mass
Mass = 75 grams
Molar mass = (12 x 12) + (1 x 22) + (16 x 11)
Molar mass = 144 + 22 + 176
Molar mass= 342 g/mol
Number of moles = 75 g / 342 g/mol
Number of moles = 0.2 moles

Hence, 75 grams of sucrose contain 0.2 moles of sucrose.

Example for solution preparation

How much barium hydroxide is needed to prepare a 0.1 M barium hydroxide solution?

 

Formula

Number of moles = mass / molar mass
Mass = number of moles x molar mass
Moles = 0.1 M
Molar mass of barium hydroxide = 171.34 g/mol
Mass = 0.1 x 171.34
Mass = 17.1 g

You would weigh out 17.1 grams of barium hydroxide to prepare a 0.1 M barium hydroxide solution.

Frequently asked questions

Q 1: How do you Prepare 0.2 M Barium Hydroxide Solution in the Lab?

Ans: Following are the steps to prepare 0.2 M barium hydroxide solution

  • Take 400ml water in a round bottom flask.
  • Dissolve 34 grams of barium hydroxide in it.
  • Add water up to the mark and your solution is ready to use.

Q 2: What is the Position of Barium in the Periodic Table?

Ans:Barium is an alkaline earth metal and is placed at the bottom of group II A.

Q 3: Is Barium Hydroxide Toxic?

Ans:Barium metal and all its corresponding compounds are toxic to humans.

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