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Thread: Why does more sugar dissolve in water than salt

  1. #1 Why does more sugar dissolve in water than salt 
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    In my experiment 29 teaspoons of sugar dissolved in water compared to salts 7 in 100ml of water

    What do i write in my discussion i need to know Why does more sugar dissolve in water than salt?


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    KJW
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    Quote Originally Posted by jashan123 View Post
    Why does more sugar dissolve in water than salt?
    I don't understand the point of the question. Sugar and salt are too different to be compared.


    There are no paradoxes in relativity, just people's misunderstandings of it.
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  4. #3  
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    I think it has to do with the chemical bonds being stronger in the salt crystals than the sugar crystals.

    Solubility - Wikipedia, the free encyclopedia
    The solubility of one substance in another is determined by the balance of intermolecular forces between the solvent and solute, and the entropy change that accompanies the solvation.
    Sodium chloride - Wikipedia, the free encyclopedia
    The attraction between the Na+ and Cl ions in the solid is so strong that only highly polar solvents like water dissolve NaCl well.
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    Yep, sugar dissolves better because it has a weaker intermolecular bond, while there is a limit to how much NaCl can dissolve in water, because they actually deplete the water capacity to dissolve (they need about 6-12 water molecules per ion), with sugar, the only real limit is to have just enough water in between to prevent crystal restructure. This is less than NaCl.

    Keep it somewhere between water depletion and ionic bonds, that is probably the correct explanation.
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    Quote Originally Posted by jashan123 View Post
    In my experiment 29 teaspoons of sugar dissolved in water compared to salts 7 in 100ml of water

    What do i write in my discussion i need to know Why does more sugar dissolve in water than salt?
    Several good points already made.

    But you might also say that because sucrose is full of hydroxyl (-OH) groups, it actually has a lot in common with water molecules, including the ability to form hydrogen bonds with them extensively. So the affinity between water and sucrose is very high.
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    Salt absorbs water, yet water absorbs sugar. you might see this in a lot of things.
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    KJW
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    Quote Originally Posted by KJW View Post
    Sugar and salt are too different to be compared.
    Although one can consider the factors governing the solubility of any compound in water: the interaction between solute molecules, the interaction between solute molecules and water molecules, the interaction between water molecules, and the entropy change, each acting to either increase or decrease the solubility, there are too many factors to balance for such very different compounds to provide a comparison that is actually meaningful and not merely tautological.
    There are no paradoxes in relativity, just people's misunderstandings of it.
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    Thanks for your replies guys realy, helpful
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