3 Calculate the molarity M of nitric acid if its concentrati

(3) Calculate the molarity (M) of nitric acid if its concentration is 75%, and its density is 150 g/mL (Hint: this will require you to do some research).

Solution

mass % = 75 %

density = 1.50 g / mL

molar mass of HNO3 = 63 g / mol

formula :

molarity = mass %   x 10 x density / molar mass

             = 75 x 10 x 1.50 / 63

             = 17.9 M

molarity = 17.9 M