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A solid must have intermolecular forces between each molecule, so when salt is added to water, the salt gets in the way of the water molecules creating IM forces with each other, therefore lowering the freezing point.

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11y ago
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12y ago

Salt water does not freeze slower than fresh (or pure) water. It does freeze at a lower temperature than fresh water. This is due to the "freezing point depression" caused by dissolving a salt (of any type) in water. Salt lowers the temperature at which water freezes and melts.

Pure water freezes (and melts) at 0°C (32°F). Seawater, which has approximately 3500 parts per million (ppm) of various "salts" (including Na, Ca, Cl, SO4, Mg, K, and CO3), freezes and melts at -2.2°C. Even saltier water in salt lakes or the Dead Sea

(with about 300,000 ppm salt) may freeze and melt at temperatures as low as -20 to -30°C.

The technical explanation as to why this happens requires complex chemistry and physic. Simply put salt interferes with the joining of water molecules to make ice.

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12y ago

because since it has salt in it. it turns to a mixture then,those particles stay in water then when it freezes it leaves salt behind.

if wrong LOOK IN A ANSWER KEY OR IN YOUR BRAIN

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12y ago

water frezzes and turns into ice , salt melts ice which turns it back in to water so it makes it harder for it to freeze , duh . (:

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11y ago

Water with salt dissolved in it has to be colder than pure water in order to freeze.

That's why we throw salt on snow and ice on the street to melt them.

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11y ago

Sodium chloride has a positive heat ot of dissolution.

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Q: What makes salt water freeze slower?
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Related questions

Does salt water freeze faster or slower than fresh water?

Salt water is slower.


Does 1 tablespoon of salt in water freeze slower than 3 tablespoons of salt in water?

no


Why does salt water evaporate slower than regular water?

salt water evaporates slower than regular water because the salt makes it harder to boil and evaporate


Why does salt freeze slower than sugar?

Salt water freezes slower than sugar because salt water has more molecules than sugar...so it drops the temp and the process of freezing


What did the salt do to the water to make it freeze slower?

Adding salt to water will lower the freezing point, thus requiring the salt water to get colder before it will freeze - it thus takes longer to freeze because it takes additional time to cool from the normal freezing point on down to the new (colder) freezing point.


Why does water freezes the fastest?

water has nothing in it but if you put some stuff in it will freeze slower.


How does adding salt to water effect evaporation?

The salt added to water makes the water colder so salt water evaporates slower than just plain fresh water.


Does salt makes water boils faster?

No it does'nt!It makes it go slower. by alshacore


What freeze faster salt or water?

Water will freeze faster than salt water.


Will water freeze on sand?

yes, it can. the reason people think it can't is because the sand at the beach is salty, and salt makes ice melt. so, with no salt involved, water can freeze


Why did the salt water freeze but the salt did?

The salt is a substance and it a ingredient that will not freeze.


Does the amount of salt in water effect the rate at which water frezzes?

Yes, salt lowers the freezing point of water (makes it take longer to freeze)