A solution of H2SO4 (90.08 g/mol) has 785.6 g of H2SO4 and 359 g of H2O. What is the molal concentration (molality)?

The molality of H₂SO₄ solution is 24.2 m.

Explanation:

We need to find the molality of sulfuric acid.

Mass of sulfuric acid = 785.6 g

Mass of water = 359 g

We have to find the moles of H₂SO₄ by using its mass and molar mass as,

Moles of H₂SO₄ =

                         = 8.7 moles

Mass of the solution in kg = =  0.359 kg

Molality =

           =

          = 24.2 m

So molality of the H₂SO₄ solution is 24.2 m.