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Thread: 7up and sodium chloride

  1. #1 7up and sodium chloride 
    New Member
    Join Date
    Aug 2007
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    1
    I was just wondering what exactly causes the extra fizzing of Sprite/7up/coke when sodium chloride is added to it.

    also, there seems to maybe be some slight colour change.

    thanks!


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  3. #2  
    Guest
    uh...the carbonation in the drink? It's been known to cause lots of "extra fizz" reactions.


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  4. #3  
    Forum Professor
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    May 2005
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    I suspect that the salt crystals give the gas bubbles something to nulceate around.
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  5. #4  
    Forum Bachelors Degree
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    May 2007
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    Both of my predecessors have it right. The solid salt crystals accelerate the release of the dissolved carbonation, most likely due to nucleation (a solid base for the carbon dioxide to come out of solution). Many substances will do the same thing.
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  6. #5  
    Forum Freshman
    Join Date
    Oct 2007
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    I believe it all come down to solubility. The salt causes the solution to become less soluble than before and, as a result, the CO2 bubbles out. This is the same explanation for cooldrink being more fizzy when it is cold.
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