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It's not! Pure water has a density of 1.000 g/ml. Sea water has a density of 1.025 g/ml and saturated salt water has a density of roughly 1.2 g/ml.

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Q: Why is pure water more dense than salt water?
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Related questions

What can make water more dense?

Water is pure by nature, however it gets dense due to different impurities. Impurities such as salt and tiny minerals cause the water to get dense.


Is rainwater more dense than salt water?

No, rain water is almost pure water as it has evaporated and will only contain small dust particles from the atmosphere. Salt water contains disolved salt and is therfore more dense.


Is warm salt water more dense than cold salt water?

Cold water is more dense.


Which is more dense fresh or salt water?

salt water


Is salt water less dense than tap water?

salt water is more dense than tap water


Since salt dissolves in water does this decrease its density?

Salt water will be more dense than the water, but less dense than the salt.


Can a wooden dowel float in salt water?

on top. Wood is less dense than water to the point that it float on top of water, and salt water is more dense and has a higher surface tension than pure water so the wood would, if possible, float higher.


Do you float in salt water or fresh water which on is more dense?

Salt


Does an egg have more dense then water?

The density of liquids really depends on the suspended matter in it. If you have really dense concentration of salt in water, yes it could be denser than an egg. If you have merely a weak solution of salt, then the egg is denser... it depend on how much salt you have in the water.


Explanation why egg float in salt water?

Because the salt water is denser than pure water.


Why is sea water more dense then fresh water?

Sea water is more dense because the minerals, especially salt, make it more dense.


Why does salt in water make objects float?

Things float in water if they are less dense than the water they are floating in. Putting salt in the water makes it more dense, so things that are a little more dense than ordinary water float in salt water.