molarity is defined as the number of moles of solute in 1 L of solution number of NaOH moles present - 0.20 mol volume of solution - 150 mL since molarity is taken as number moles of solute in 1000 mL if 150 mL contains - 0.20 mol then 1000 mL should contain - 0.20 / 150 x 1000 = 1.33 mol therefore molarity is 1.33 M
