Explanation:
Molarity is defined as the number of moles divided by one liter of solution.
Mathematically, Molarity = [tex]\frac{\text{no. of moles}}{\text{volume in liter}}[/tex]
As it is given that volume is 2.0 L and mass is 10.0 grams. Therefore, first we will calculate the number of moles as follows.
No. of moles = [tex]\frac{mass}{\text{molar mass of NaOH}}[/tex]
= [tex]\frac{10.0}{40 g/mol}[/tex] (molar mass of NaOH = 40 g/mol)
= 0.25 mol
Hence, calculate the molarity of the solution as follows.
Molarity = [tex]\frac{\text{no. of moles}}{\text{volume in liter}}[/tex]
= [tex]\frac{0.25}{2.0 L}[/tex]
= 0.125 M
Thus, we can conclude that molarity of given solution is 0.125 M.
