How many moles of H2SO4 are present per milliliter of solution? What is the mass % of H2SO4 in the solution?

Question

Concentrated (H2SO4) Sulfuric acid (18.3 Molarity) has a density of 1.84 g/mL.

Answer 1

The molar mass of sulfuric acid is 98.08 g/mole The solution is 18.3 molarity, so there are 18.3*98.08 g of acid in one liter, (or 18.3*98.08/1000 grams in one mL). This is 1795g in one liter At a density of 1.84g/mL, the volume taken up by acid is 0.976L, which means that the 1L solution is 0.976L acid and 0.24L water. The water mass is then 240g. The total mass is then 1795+240=2035g; The mass % is then 1795/2035=88%

There are 18.3/1000 moles in one mL.