Question

concentrated aqueous sulphuric acid is 98% H2SO4 by mass and density of 1.80 gm/L. Volume of acid required to make one litre of 0.1M h2so4 solution is ??

Answer 1

98% by weight means 98 gm H2SO4 in 100 gm solution or 98 g H2SO4 in 2 g water.
Number of moles of H2SO4 = 98/98
= 1
Density = 1.8 g/L
Volume of solution = Mass of solution/ Density
= 100/1.8
= 55.55 ml
= 0.055 L

Molarity of solution = moles of H2SO4/volume of solution in litre

= 1/0.055 = 18.18M

Applying,
M1V1 = M2V2
18.18 x V1 = 0.1 x1
V1 = 0.0055 L = 5.5 ml

Hence , volume of acid required = 5.5 ml