The molarity of Ba(OH)₂ barium hydroxide solution is 0.41 M.
Molarity (M) is the amount of a substance in a certain volume of solution.
Molarity is defined as the moles of a solute per liters of a solution.
Molarity is also known as the molar concentration of a solution
It can be written as
[tex]\rm Molarity = \dfrac{moles\; of\; solute}{litres\; of \;solution} \\[/tex]
The given data is
Mass of Ba(OH)₂ = 3 g
Volume of solution = 42.8 ml = 0.0428 l
Molecular weight of Ba(OH)₂ = 171 g
Moles of Ba(OH)₂ = 3/ 171 = 0.0175 moles
Molarity = 0.0175/0.0428
=0.41 M
Therefore the molarity of Ba(OH)₂ is 0.41 M.
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