Why densities of pure and salt water are different

[yjk91]

Density = mass/volume (D=m/v), explain the difference in density of pure & salt water in words and using a mathematically based example

[symbolipoint]

The ions of the salt fill space within the liquid. Not sure about any equations to help with this.

[Kushal]

density of pure water and impure water are different... as you said, density = mass/volume.

what do you think will happen to the mass and volume when salt is added to the water?!

[granpa]

density of salt=2.17 g/cc


The density of seawater ranges from 1020 to 1030 kg/m3
The total dissolved salts in seawater are approximately 34.4 g/L
http://www.incois.gov.in/Tutor/IntroOc/lecture03.html
http://www.incois.gov.in/Tutor/IntroOc/notes/figures/fig3a4.html

[Borek]

The ions of the salt fill space within the liquid. Not sure about any equations to help with this.

Not exactly, ions are ordering water molecules, changing how densely they are packed.