Question

What volume of 95% sulpheric acid(density=1.85g/cc) and what mass of water must be taken to prepare 100cc of 15% solution of sulpheric acid(density=1.1g/cc)?
{Answer Are : Volume=9.36 cc & mass=90.64g}​

Answer 1

● Answer -

9.4 ml 95% H2SO4 in 90.6 ml water

● Explaination -

Total mass of solution

= density × volume

= 1.1 × 100

= 110 g

Mass of 15% H2SO4 in solution

= 110 × 15/100

= 16.5 g

Mass of water in solution

= 110 - 16.5

= 93.5 g

Mass of 95% H2SO4 required

= 100 × 16.5 / 95

= 17.37 g

Volume of 95% H2SO4 required

= 17.37 / 1.85

= 9.4 cm^3

= 9.4 ml

Volume of water required

= 100 - 9.4

= 90.6 ml

Therefore, 9.4 ml of 95% H2SO4 should be added in 90.6 ml water.