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  • 1.
    Sodium chloride - Wikipedia, the free encyclopedia
  • Sodium chloride, also known as salt, common salt, table salt, or halite, is an ... Sodium chloride is sometimes used as a cheap and safe desiccant because it ...
  • http://en.wikipedia.org/wiki/Sodium_chloride
  • 2.
    sodium chloride: Definition from Answers.com
  • sodium chloride n. A colorless or white crystalline compound, NaCl, used in the manufacture of chemicals and as a food preservative and
  • http://www.answers.com/topic/sodium-chloride
Questions/Answers
Sodium Chloride?
I'm doing observations for an experiment and would like to know what you would see if you made sodium chloride a saturated solution and then heated it up and made it saturated again. Would it just be crystals?
If the solution is saturated in sodium chloride - then that means no more will go into solution. If you raise the heat - you may make MORE sodium chloide dissolve to form an even MORE saturated solution, but as is cooled the excess sodium chloride would precipitate out. While it is precipitating out ts would act as seed crystals for the saturated solution causing the already saturated sodium chloride to precipitate out. So in the end - you'd still end up with a saturated sodium chloride solution, but it would be less saturated than if you hadn't heated and then cooled it. Of course, with the new crystals in the bottom of your cooled flash you could vigorously shake the solution for about 10 minutes (stoppered of course), and then the solution would again be the same saturated solution as you started with in the first place!
Why does sodium chloride haveto be heated to 800 degreesbefore melting?
Why does sodium chloride have to be heated to 800 degrees before melting, but candle wax will start to melt at 50 degrees? I understand how sodium and chloride, having opposite charges, have a strong attraction, but I don't understand what candle wax has to do with anything. Does it have a weak attraction? Thanks!
NaCl is a small molecule with strong ionic bonds - it has only Na and Cl to be able to break down to, both of which are much less stable than the NaCl itself. Candle wax on the other hand is a long chain hydrocarbon with relatively weak bonds with a whole variety of smaller organic chemicals it can break down into, so requires far less energy (ie heat) to break down.
Sodium chloride has a greatereffect on the boiling point ofa solution than an equimolar ?
Sodium chloride has a greater effect on the boiling point of a solution than an equimolar amount sucrose. Explain.
The effect of a substance on the boiling point (or freezing point) of a solution has to do with the number of particles in the solution. Since sodium chloride is an ionic salt it was dissociate once it is in water, creating double the number of particles. So for example 1M solutions of NaCl and sucrose are both mixed up. There would still only be 1 mole of sucrose in that solution, while the sodium chloride solution would contain 1 mole of sodium ions AND 1 mole of chlorine ions for a total of 2 moles of particles.
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