Commercial perchloric acid is 70.0% by mass, HClO₄(aq), and has a density of 1.67 g/mL. Calculate the molarity of perchloric acid in the solution.

Question

Quizplus · Accepted Answer

To find the molarity, first calculate the mass of HClO4 in 1 L of solution: 1.67 g/mL * 1000 mL = 1670 g. Then, find the mass of HClO4: 1670 g * 0.70 = 1169 g. The molar mass of HClO4 is approximately 100.46 g/mol. Molarity = 1169 g / 100.46 g/mol / 1 L = 11.5 M.

Commercial Perchloric Acid Is 70