Question

15% of H2SO4 acid is dissolving in H2O having density 1.19g/cm3. what is normality, molality and molarity?

Answer 1

% sulphuric acid is 15%

Density 1.19 g/cc

1 litre will weigh 1190 g that will have 1190 x 15/100 g sulphuric acid

1 litre will have 178.5 g H2SO4 = 1.82 moles = 3.64 equivalents

That means it is 1.82 M and 3.64 N

1190 g of solution contains 178.5 g H2SO4 and 1011.5 g water

or 1.82 moles in 1.0115 kg of water

There fore no. of moles per 1 kg of water = 1.82/1.0115 = 1.8

molality = 1.8 m

Result:

Normality = 3.64 N

Molarity = 1.82 M

molality = 1.8 m