Commercially available sulphuric acid contains 91% acid by mass and has a density
of 1.83g mL-1

(i) Calculate the molarity of the solution

(ii) volume of concentrated acid required prepare 3.5 litre of 0.50M H2SO4

To calculate the molarity we must know how much no. of moles of H2SO4 is present in 1 L of solution.

Now 1 mL contains H2SO4 as = 1.83 g,
So, 1L will contain 1830 g of H2SO4.

Also , it is 91% w/w , So from here get the no. of moles of H2SO4 present in 1 L of the solution.


For the second part , apply M1V1 = M2V2 and get the volume required.