interesting fact about salt

If you pour a handful of salt into a glass of water, the water  level will go down

When you step inside a bath tub, the water level will immediately go up, per Achimedes’ law. But when you add a volume of sodium chloride (salt) to a volume of water, the overall volume actually decreases by up to 2%. What gives? The net reduction in observed volume is due to solvent molecules which become more ordered in the vicinity of dissolved ions.