how ways can salt be removed from water?
470626
Well when I was at camp as a kid what we did was wrap a bag around a tree limb.  You know like the big garbage bags.  during a day a good amount of water collects.  Another way is to place a plastic sheet over a thing of salt water....during the day the salt water evaporates onto the plastic and runs down.  That's drinkable too....need to make sure to catch the run off though.
308462
i suppose the question i ask is have you actually ever done this?\n\nto seperate sand and water obviously you pour some water in a beaker with your sample and stir it, you filter the solution using a glass funnel and a filter paper.  you take the filter paper after you have finished and open it up and let it dry with the sand on, you take the water from the filtrate beaker and leave it to evaporate in a watchglass and then scrape the salt off.
1086630
Do you mean demineralized water?\n\nReverse osmosis is the most economical way.\n\nCheck out millipore, look up their RO products.
894325
NaCl or any salts?\n\nI don't know of any substance that "repels" a salt, other then a waterproofing.  Since salt dissolves in water you would likely have to repel the water, not the salt.
782152
Through evaporation, the water evaporates into the air and leaves the salt behind.\n\nWhen the water in the air condenses and comes back to earth as rain or snow or dew, it is again fresh water until it flows into a body of saltwater where it again mixes with the salt.\n\nSalt can also be removed through a variety of chemical and/or electrolytic "desalination" processes, but I assume you mean naturally.\n\nThe principal methods of mass conversion of salt water to fresh water (for providing drinking water in a desert environment or onboard a ship at sea) is done through either distillation, in which the salt water is boiled leaving the salt behind and the steam recondensed to form liquid water, or through a process called osmosis where the water flows through a membrane or material that the salt will not pass through.\n\n=== EDIT ===\n\nYes, a bit of research confirms that the principal method of converting saltwater to freshawater onboard a ship is either a flash-type evaporator (primarily used on older ships and nuclear powered ships) or a reverse-osmosis plant (used on more modern ships).  Both types are also used on US Navy bases where freshwater is not readily available.\n\nThe evaporator basically pre-heats the saltwater to near boiling, and then injects it into a vacuum chamber where it immediately flashes into steam except for a small amount of "brine" left over -- the steam is run through cooled pipes where it condenses into water, and the leftover brine is pumped back overboard.\n\nThe reverse-osmosis uses high pressures to force the water through a membrane which the salt cannot pass through.  Again, the leftover "brine" is pumped back into the ocean since it is just seawater with some of the water removed.
66544
Salt will lower the freezing point of water. That is why the use in on the roads in winter.
797871
raising the temperature. like with a saturated solution of salt-water, if you reise the temperature the water will take in more salt. it's the same with other thing too.
24556
Everyone who has been to the beach knows that seawater is salty. Everyone also knows that fresh water in rain, rivers, and even ice is not salty. Why are some of Earth’s waters salty and others not? There are two clues that give us the answer. First, “fresh” water is not entirely free of dissolved salt. Even rainwater has traces of substances dissolved in it that were picked up during passage through the atmosphere. Much of this material that “washes out” of the atmosphere today is pollution, but there are also natural substances present.\n\nAs rainwater passes through soil and percolates through rocks, it dissolves some of the minerals, a process called weathering. This is the water we drink, and of course, we cannot taste the salt because its concentration is too low. Eventually, this water with its small load of dissolved minerals or salts reaches a stream and flows into lakes and the ocean. The annual addition of dissolved salts by rivers is only a tiny fraction of the total salt in the ocean. The dissolved salts carried by all the world’s rivers would equal the salt in the ocean in about 200 to 300 million years.\n\nA second clue to how the sea became salty is the presence of salt lakes such as the Great Salt Lake and the Dead Sea. Both are about 10 times saltier than seawater. Why are these lakes salty while most of the world’s lakes are not? Lakes are temporary storage areas for water. Rivers and streams bring water to the lakes, and other rivers carry water out of lakes. Thus, lakes are really only wide depressions in a river channel that have filled with water. Water flows in one end and out the other. \n\nThe Great Salt Lake, Dead Sea, and other salt lakes have no outlets. All the water that flows into these lakes escapes only by evaporation. When water evaporates, the dissolved salts are left behind. So a few lakes are salty because rivers carried salts to the lakes, the water in the lakes evaporated and the salts were left behind. After years and years of river inflow and evaporation, the salt content of the lake water built up to the present levels. The same process made the seas salty. Rivers carry dissolved salts to the ocean. Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in the ocean. Because of the huge volume of the oceans, hundreds of millions of years of river input were required for the salt content to build to its present level. \n\nRivers are not the only source of dissolved salts. About twenty years ago, features on the crest of oceanic ridges were discovered that modified our view on how the sea became salty. These features, known as hydrothermal vents, represent places on the ocean floor where sea water that has seeped into the rocks of the oceanic crust, has become hotter, and has dissolved some of the minerals from the crust, now flows back into the ocean. With the hot water comes a large complement of dissolved minerals. Estimates of the amount of hydrothermal fluids now flowing from these vents indicate that the entire volume of the oceans could seep through the oceanic crust in about 10 million years. Thus, this process has a very important effect on salinity. The reactions between seawater and oceanic basalt, the rock of ocean crust, are not one-way, however; some of the dissolved salts react with the rock and are removed from the water.\n\nA final process that provides salts to the oceans is submarine volcanism, the eruption of volcanoes under water. This is similar to the previous process in that seawater is reacting with hot rock and dissolving some of the mineral constituents.\n\nWill the oceans continue to become saltier? Not likely. In fact the sea has had about the same salt content for many hundred of millions if not billions of years. The salt content has reached a steady state. Dissolved salts are being removed from seawater to form new minerals at the bottom of the ocean as fast as rivers and hydrothermal processes ar
110217
drink water and avoid salt
385501
mostly mineral, you'll probably find sodium chloride (salt) in it, but it depends on which water body is evaporated.
180762
To create water from saltwater, you could\n- boil or evaporate the saltwater and collect the vapor using a distilling contraption (e.g., put a plastic bag over the pot and catch the condensate)--this is the most practical way\n- use osmosis to separate the water from the saltwater, but this would be extremely expensive and require a lot of membranes/filters\n\nA heat source could be the sun, a fire, an energy plant, or anything else producing heat (geothermal, coal, nuclear, etc.).  More heat produces desalinated water faster.\nTo create more water faster, use a bigger heat source.
969567
You can evaporate, or distill off the water.  Then you'll get the CuSO4, along with any non-volatile impurities that may be present.  Or you can do a recrystalization.  You boil the solution until the CuSO4 just starts to crystalize out.  Then you let the solution cool.  As it cools, the solubility of the salt decreases, and more & more of it crystalizes.  When cooling, you may end up with a super-saturated solution, instead of crystals being formed.  In that case, scratching the inside of the beaker with a glass rod will initiate the crystalization process.  With recrystalization, the product is also purified.
700454
One way to do that for relatively small volumes of water is to force the sea water through a special membrane filter under high pressure. The filter membrane must be constructed so that its holes are large enough to just pass a water molecule, but not large enough to pass metal\nmolecules, salt molecules, algae, etc. The result would be fresh clean water with a lot of brine solution left in the pressurized tank that needs to be dumped.\n\nAnother process which is more poractical for large volumes of fresh water production is electrolisis. In that process, electrical current is passed through the water to break it down into its basic elements such as hydrogen and oxygen (and all the other junk that is left over).\n\nOnce the hydrogen and oxygen are collected and recombined, the result is pure fresh water. Again, the vat or tank holding the original sea water now has a heavy brine solution which must be disposed of somehow. Most any use of sea water to produce fresh water will generate a lot of salty brine by-product that could poison sweet earth in the vicinity if it is merely dumped.
579981
Iron and water.  Just wash the sand off the iron.
136023
its called salting out.  adding salt will precipitate the soap but not the glycerin. then filter
910154
i've never heard of salt cleaning oil stains, and as far as i know it cant, salt won't react with oil, because oil is non polar and salt is polar, you need a polar liquid to dissolve a polar substance and vice versa, \nnow i can tell you how soap or dishwashing liquid cleans oil stains, basically the molecules in soap have 2 ends, one end is polar and the other is non polar, so the non polar end binds to the oil, while the polar end binds to the water and washes it away\n\nhope that helps
731293
sodium & chlorine to make NaCl, table salt