How does salt afffect the boiling point of water?
412906
To turn liquid water into steam the weak bonds between the molecules have to be broken and the molecules accelerated enough to leave the water surface and become vapour. This requires energy supplied by heating. \n\nNow add salt.\n\nThe salt consists of NaCl crystals. In water these dissolve into Na+ and Cl- ions. These ions will become surrounded by water molecules that are attracted to them, forming large clumps of molecules. To break these bonds requires more energy than in the case where the salt was absent.\n\nWe have to supply this extra energy and the result is boiling at a higher temperature.
64882
Water's boiling point is 100 degrees Celcious (212 Fahrenheit), at zero altitude. Altitude can change the boiling point for water.\n\nYou can calculate that if you know your altitude, by following the link provided below.
237614
Table salt doesn't get affected at all chemically.\n\nAnd it doesn't raises the boiling point, it lowers it!!!
777060
Tap water. Dissolved salt raises the boiling point, so salt water  takes longer to boil.
66544
Salt will lower the freezing point of water. That is why the use in on the roads in winter.
90779
c basically boiling of a liquid means the vapour pressure[pressure created at surface] equals the atmospheric pressure.the increase in vapour pressure is due to the fact that the kinetic energy of molecules movin thermal velocities because of increase in temp. therefore for some molecules the time taken by molecules to achieve this situation is faster as the molecules have diff forces of attraction .hence to break the forces and achieve the above situ. is diff for diff. liquids \n\n\nhope this is satisfactory any more queries  mail me
617322
Althouigh I am sure you mean Sodium Chloride when you say "Salt", just to be perfectly clear....there are multiple types of "salt".\nA salt is an ionic compound made up of a matal cation and a non-metal anion. Sodium Chloride ("table salt") is an example of a salt, so is Potassium Chloride and Ammonium Nitrate.\n\nWhen you dissolve a salt in water, the freezing point of the solution is lowered.  Likewise, when dissolving a salt, the boiling point of the solution is raised.\n\nBut you asked about a temperature change.\nWhen dissolving some salts, the dissolving process is endothermic...meaning that it requires enegry input to proceed.  When a endothermic process occurs, the temperature of the surroundings (this case, the water) drops.\nThere are also salts which give off energy when they are dissolved in water.  Processes which give off excess energy are called exothermic and can raise the temperature of the surroundings.\nThere are also a few (not too many) "ideal" salts which neither take in or give off energy when they dissolve.\n\nWhen the salt dissolves, if the "product" (the aqueous salt) has a lower enthalpy than the undissolved salt, the solution is said to be exothermic.  If the enthalpy increases, the solution is said to be endothermic.\n\nSalts like Potassium Chloride, Ammonium Nitrate, and several others (probably NaCl too, which you refered to) are endothermic when dissolved in water, and thus, when dissolved cause the temperature of the solution to decrease slighty.\n\nSalts like Sodium or Potassium Hydroxide are great examples of salts which are exothermic (give off energy) when they are dissolved in water.  When dissolving these salts in water, a notible increase in temperature can be observed.
812047
its called freezing point depression.\n\nwhen you add any electrolytes (like salt) to water, you lower the freezing point of water, the more you add, the lower the freezing point
1162703
Higher. Boiling point is reached when the vapour pressure of the liquid is equal to the outside pressure. At sea -level boiling point of water is 100 C. So below sea level, since the air pressure is greater, boiling point is higher than 100 C
105979
the boiling point of water at sea level is 212 deg F. the boiling point of water in the mountains is different because the column of air is not as "tall" as it is at sea level. the boling point is when the vapor pressure of a heated liquid exceeds the atmospheric pressure. sea level has a certain atmospheric pressure and thus a certain boiling point for water. at high altitudes the pressure is less and below sea level the pressure is greater.
649941
The boiling point of water is dependant on the (air) pressure on it. Put water into a pressure cooker and its boiling point will increase. Take water to the bottom of a deep mine and the BP will be above 100 degrees. Theoretically. the boiling point in the centre of a cyclone would be lower than in the centre of a high pressure cell.\n\nThe atmospheric pressure on the surface of the water is what stops water molecules escaping. The lower the pressure the easier it is for them to escape and the higher the pressure the harder it is for these molecules to escape. The boiling is the violent action of the molecules trying to escape.
194492
Salt raises the boiling point of the water. So if you add salt to the water, water boils at a higher temperature than 100C and cooks the pasta faster. It is the same procedure for the roads. Salt lowers freezing point of the water, so ice freezes at a temperature lower than 0C. If it is -5C outside the water doesn't freeze so the roads don't become slippery because of ice. Also this principle is used in the cars, i.e. antifreeze liquid.
321949
boiling then cooling is the process of distillation- so youre giving a fancy explanation for distilled water. it gets rid of all the ions or disolved products in the water so you dont have anything interfering with the reactions (such as dust, metal ions, chlorine ions, carbonic acid, etc. can cause side reactions, alter pH, etc.) or with weights (the ions and disolved particles in tap water may alter the water's weight and mess up your calcs)
778296
Salt can affect rate of corrosion  even if there is no water present.  This is due to the following reasons:\n\nNaCl dissolves into Na+ and Cl- ions in the presence of water.   These ions act as conductors of electricity  and make the water more conductive.  This increases the rate of corrosion.\n\nCl- ion is a strong reducing agent.   Therefore, it attacks the iron (III) oxide layer already formed and exposes a new layer of iron.  This also speeds up the rate of reaction.\n\nFinally, even if there is no water, NaCl itself has the property of hydroscopicity.  That means that it has the ability to absorb water even from the atmosphere.   \n\nAll these factors sum up to make salt a major contributor to corrosion.
748490
If you are asking how to separate a mixture of water and salt, then you need to distill the water.  Distillation separates materials by adding increasing amounts heat in order to boil off the materials at theri respective boiling points.  The material that boil at a lower temperature would be removed first.  As you increase the tempreature, higher boiling temperature materials are separated.\n\nSince the water boils and the salt does not, all you need to do is heat the mixture up until it boils.  The water will vaporize and can be captured in another container, leaving the salt behind in the original container.
109177
i believe its because the boiling point of water is only 212 at normal atmospheric pressure, so if the pressure is changed the boiling point does too.
1420
Good question.   Could be a number of reason, but my guess would be that you have some salt in your boiling water.    When NaCl solution is placed in a flame the Na cation gets ionized and yellow light is given off.    It doesn't take much salt for you to see this effect.   You will see this even with regular tap water, since it also has a small amount of salts dissolved in it.    \nIn fact, standard distilled water is usually not pure enough to avoid this effect.    That's why chemist buy special stills to make ultrapure water for experiments.