Question

what is the amount of H2SO4

Answer 1

Concentrated H2SO4 is 96% by weight H2SO4 and has a density of 1.84g/mL. Calculate the volume of concentrated H2SO4 acid required to make 150mL of 4M H2SO4?

This is what I did:

Liters X M = number of moles

so 150mL/1000 = .15 L

.15 L x 4 = .6 mole

wt_g = number of moles x Molecular weight wt_g = .6 x 98.079 = 58.8474 g pure H2SO4 needed.

Stock solution is not pure H2SO4 but only 96% H2SO4 by weight. So

58.8474/.96= 61.299375 stock solution is needed.

vol_ml = ( wt_g) / (p g/ml) so:

61.299375/1.84= 33.31mL of H2SO4 needed.