Question

A barium hydroxide solution is prepared by dissolving 1.68 g of Ba ( OH ) 2 in water to make 45.6 mL of solution. What is the concentration of the solution in units of molarity

Answer 1

[Ba(OH)₂] = 0.21 M

Step-by-step explanation:

Molarity is a sort of concentration for solute that determines the moles of solute contained in 1 L of solution (mol/L).

Solution's volume = 45.6 mL

We convert the volume from mL to L → 45.6 mL . 1 L/1000 mL = 0.0456L

Our solute: Ba(OH)₂

We convert the mass of solute to moles → 1.68 g / 171.33 g/mol =

0.00980 moles

Molarity → mol/L → 0.0980 moles / 0.0456L = 0.21 M