Question

battery acid is 4.27M H2SO4 and has density 1.25 what is the molarity of H2SO4 in the solution​

Answer 1

you mean, battery acid is 4.27M H2SO4 and has density 1.25 what is the molality of H2SO4 in the solution ?

solution : molarity of H2SO4 = 4.27M

means, 4.27 mole of H2SO4 present in one litre of solution.

given, density of solution = 1.25 g/cm³

so, mass of solution = density × volume

= 1.25 g/cm³ × 1Litre

= 1.25g/cm³ × 1000 cm³

= 1250g

mole of solute (H2SO4) = 4.27

molar mass of solute = 98 g/mol

so, mass of solute = 4.27 × 98 g

= 418.46 g

so, mass of solvent = mass of solution - mass of solute

= 1250 - 418.46 = 831.54g

so, molality = number of mole of solute/mass of solvent in kg

= 4.27 × 1000/831.54

= 4270/831.54

= 5.135