When salt is dissolved in water,
the salt crystals do not cease to exist: they are only broken up into
particles so small they are not visible to the naked eye.
Disappearance of salt during a dissoulution is therefore only apparent:
actually there is always the same amount of salt.
Since salt doesn't really disappear, it keeps the mass he had before
For iinstance if 10 g of salt idissolved 10 in 200 g of water then the
resulting mixture have a mass equal to 200 + 10 or 210 g.
reasoning can be extended to all dissolutions.
There is always conservation of mass when a solid is dissolved in a
liquid: The total mass of solvent and solute is equal to the mass of