how can you make fresh water from salt water?
350106
You will need Chlorine gas. Due to the common ion effect the salt(Sodium Chloride) will precipitate out leaving the fresh water.\nMaterials Needed:\nChlorine gas\nSalt Water
134404
Salt decrease the melting point of water so adding salt to ice wich is fresh water will make it melt at a lower temperature than 0 celsious.
777060
Tap water. Dissolved salt raises the boiling point, so salt water  takes longer to boil.
550319
salt water and fresh water.
625154
are you trying to turn saltwater back into separate salt and water? you need to heat the saltwater which will make the water evaporate. The salt won't evaporate so it'll stay in the container. If you need the water, you'll need to have a surface to let it condense on
415923
Yes, salt water is a sodium chloride solution with Na+ and Cl- ions. when two seperate condutors are immersed in the solution without contacting each other and a bulb or any electrical appliance is placed across the conductors the positive and negative ions migrate and conducts electricity.
99026
Water boils at 212F, at sea level!  If you boiled water at the top of a tall mountain the boiling temperature would be far less (and you need to cook food longer) because there is less atmospheric pressure to resist boiling.\n\nOnboard a large ship, fresh water is made from salty seawater in a distillation plant.  The seawater is heated using steam from the propulsion plant and the pressure in the distiller is lowered using an air ejector to promote boiling and evaporation which leaves the salt behind to be discharged as enriched brine.  The air ejector works similar to the squeeze bottle that dispenses perfume.  Squeezing the rubber bulb produces a high velocity air stream that passes over a dip tube creating a partial vacuum that sucks up the perfume to be atomized.  In the shipboard air ejector, live steam is passed through a narrowed Venturi tube to increase velocity and drops the pressure allowing any air to be entrained and removed from the evaporator and the pressure can be dropped further (in one or more stages) to cause the brine to flash to steam which can be removed and condensed (as pure water) using seawater as the coolant in a heat exchanger.  The pure water is used for hotel loads such as cooking and showers and drinking but large quantities are needed to make up for pure water loses from the propulsion plant.  Onboard ship, the evaporators are not directly fired but are in fact indirectly fired by the ship's furnace and boilers.\n\nOn land, electric heaters could be used to "fire" a distilling plant.  The term "fire" can be used for any heat source.
242248
Evaporation from the sea. Dig shallow pools and with bis leaves collect the moist. You can also get salt this way. Also collect the water from the rain.
496939
in the middle of the sea on  a small boat.... I dont know.  On a ship or at a lot of resorts there is one common way... Reverse Osmosis.  Plain and simple, it's pushing the water through a series of filtrations... multimedia and then through membranes at high pressures.  It is then treated with a variety of chemicals.\n\nThe old way to do it on ships is through multi-staged flash-type distilling plants where the water is boiled at 68F-72F under a vacuum and then treated with a Brominator.
554126
because of the salt content, salt tends to draw water out, hence out in the open the salt would allow the water to be evaporated much more quickly than fresh water
904474
Do not crush the rock salt as this will make the impurities harder to remove.\n\nDissolve the rock salt in very hot water and filter.  If the filtrate (the water that comes through the filter) is colored, then you might need to treat it with charcoal to remove these soluble impurities.\n\nOnce you have a clear solution, allow some of the water to evaporate until the solution becomes saturated.  A single seed crystal will start the formation of sodium chloride crystals from the solution.  Stirring will keep the crystals smaller, otherwise you can end up with one very large crystal of salt.\n\nThis crystallization process is what does the final purification.  The crystals formed will be almost pure sodium chloride.
176592
boil water and add teaspoon of salt, pour into container and refrigerate for a day\npour out and wash container\nsmell should be done
812815
Soak them in fresh water...or put them in salt.
858193
Yes.  Salt water freezes at a lower tempurature than fresh water. \n\nThat is why we use salt to melt ice on sidewalks in the winter.
408672
No.. If you were to drink salt water you would dehydrate faster as the water inside your body would be sucked out to reduce the saltyness of the water. This is called osomosis and you can't avoid that.\nHowever, it is very easy to evaporate the water off and then condense it into drinkable water. Then you could "drink" the water from the sea.\nIsrael supplies most of its fresh water from the sea by "desalination" which is the process of removing the salt.
1011630
I know of two ways.\n1. It is mined from deposites underground.  They used to do this near where I grew up as the chlorine in the salt was used in the processes at the nearby chemical plants.\n\n2.  It is evaporated from ocean water.  Once the water is evaporated mostly what's left is just regular salt.  It just has to be cleaned up a bit.
971927
Sure, take a plastic bottle, like an empty coke bottle.  Punch a couple of holes in it, and put in a little piece of cork or styrofoam.  Fill it with real salty water (you'll need a lot of salt!).  Since salt water is heavier than pure water, it will sink, but after awhile the salt water will run out of the holes and fresh water will replace it, and the cork or styrofoam will make it float.  You'll have to experiment with the size of the piece of styrofoam, it needs to be small so it barely makes the bottle float.\n\nGood luck!\n\nAnd make sure your floating piece isn't going to soak up water, or of course it won't work.