Concentrated aqueous sulphuric acid is 98% H2SO4 by mass

CBSE Class 11
1

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has density of 1.80gm/L.

2

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass
Density = 1.80gm/L
Number of moles in H2SO4 of Concentration 0.1 M and volume 1 l =
n = C × v
= 0.1 × 1
= 0.1
Calculate the mass required to get 0.1 mol H2SO4
n = unknown mass/Molar mass
= unknown mass/98 gmol-1
0.1 × 98 gmol-1 = 9.8 g
?
We need 9.8 gram H2SO4
Convert this mass in volume using density = mass/volume
1.80 gml-1 = 9.8g /volume
volume = 9.8 g/1.8g ml-1
= 5.44 ml.
5.44 ml will require if solution is 100 % pure, But given it is 98%
So the volume required = 100 x 5.44/98
= 5.55 ml
The volume of acid required to make 1 litre of 0.1 M H2SO4 solution is 5.55 ml.