You’ve seen trucks dumping salt on roads. Why? Because salt destroys the freezing point. It’s pure chaos. Salt ions get between water molecules, making it way harder for them to link up into ice.
Acetonitrile Water Freezing Point – PMVG
With enough salt, water stays liquid down to -6°F (-21°C). That’s why the ocean doesn’t freeze solid in winter. It’s basically a giant, salty soup that refuses to cooperate with Jack Frost.
Fun fact: This is also why you shouldn’t use salt on your driveway if you have pets. It burns their paws. Use sand instead. The freezing point is already messy enough without you causing puppy pain.
Pressure makes water do yoga
Most things shrink when they freeze. Water expands. This is a huge deal. It’s why your pipes burst in winter. That expanding ice is like a tiny, angry Hulk inside your walls.
But here’s a mind-bender: under extreme pressure, water’s freezing point drops. Way down. Ice skating works because the blade’s pressure melts a microscopic layer of water, letting you glide. You’re skating on liquid created by your own weight.
Some ice exists deep in the ocean at temperatures below 32°F. It’s called brinicles, or “ice fingers of death.” A tube of supercold brine sinks down, freezing everything it touches. It looks like an alien tentacle. No joke.
