General Knowledge - General Science - Discussion

Rather than thinking of sugar dissolving "faster" than salt, look at the situation as a matter of how much of each dissolves. In other words, a greater weight of sugar will dissolve in a fixed quantity of water than will salt in that same amount of water. Simpler still, sugar is more soluble than salt. Factors that influence the amount of each that will dissolve (and the speed at which they dissolve) are the nature of the solutes themselves, the temperature and purity of the water, and whether the solution is stirred during the dissolution process.

Salt is an ionic compound -- that is, the sodium and chloride parts are charged particles, Na+ and Cl-. The bonds that join these ions in the crystal are very strong. That's why salt is so very hard to melt. Sugar melts easily because the bonds that hold those molecules together in the solid (crystalline state) are much weaker.

What is true in the solid state is not necessarily evident when these materials are asked to dissolve in water. Both the ions comprising salt and molecules of sugar can interact with water once these particles are freed from their crystalline states by the dissolution process. Once dissolved and free to move within the solution, the bonds between sugar molecules and water are more numerous in number than those that can form between the Na+ and Cl- ions in salt. So, as sugar molecules dissolve from the crystal, they are immediately surrounded by water molecules that insulate them from recombining with the crystal. This also happens when the ions of salt are free of the crystal. Even so, the opportunities for bonding with water molecules are fewer with salt than with sugar because the ions are very small when compared to the size of sugar molecules.

The initially stronger ionic bonds in salt and the more numerous water-sugar bonds that form after dissolution gives sugar the solubility edge. Thus the greater solubility of sugar over salt.

http://wiki.answers.com/Q/Why_is_sugar_more_soluble_than_salt

Sugar (C12H22O11) is a polar covalent molecule. When it dissolves in water, the weak bonds between the carbon, hydrogen and oxygen atoms are broken. In the process, the bonds in the water molecules are also broken, and inter molecular bonds between the water and sugar molecules can then form. This allows up to 1800 grams of sucrose to dissolve in a mere liter of water.

Salt (NaCl) is an ionic molecule which is formed between a positive ion and a negative ion. The bond between atoms is much stronger than those in a covalent molecule. Consequently, it takes more energy to break the bond between sodium and chlorine. Salt molecules are also smaller than sugar molecules which leaves fewer opportunities for inter molecular bonds to form between salt and water.

We know that solid solution are of two type.

1) substitutional solid solution.
2) international solid solution.

In substitutional solid solution, the element that is solute A is distributed in between the solvent B particles.

Again substitution solution is divided into 2 types.

1) order solution.
2) disorder solution.

In order solution, the solute particle arranged in the form of a regular pattern.

Eg sugar with water.

In disorder, the solute atoms dissolve but randomly dissolve in between the solvent atoms.

So, The answer is sugar.

I did this experiment and sugar is the most soluble in boiling hot water.

This was my experiment:.

Sugar: I had to stir each tea spoon of sugar for quite a while but amazingly it was the most soluble out of all the substances I put in the boiling hot water. I put 7 teaspoons of sugar into half a glass of boiling hot water.

Salt: On the 1st tea spoon the salt dissolved really quickly so I thought that it would be the most soluble but at the 3rd tea spoon it wouldn't dissolve anymore.

NaCl: water solubility 359 g/L.

Sugar (sucrose): water solubility 2000 g/L.

However, if we look at this on a molar basis:
NaCl: water solubility 359 g/L.
(359 g/L)/(58.44 g/mol) = 6.14 moles/L.

Sugar (sucrose): water solubility 2000 g/L)/(2000 g/L)/(342.30 g/mol) = 5.84 moles/L.

So on a molar basis, the solubilities are close and one might conclude that the apparent difference lies in the difference in molar masses.

Therefore, SUGAR.

aCl: Water solubility 359 g/L.

Sugar (sucrose) : Water solubility 2000 g/L.

However, if we look at this on a molar basis:

NaCl: Water solubility 359 g/L.

(359 g/L)/(58.44 g/mol) = 6.4 moles/L.

Sugar (sucrose) : Water solubility (2000 g/L).

(2000 g/L)/(342.30 g/mol) = 5.84 moles/L.

So on a molar basis, the solubility are close and one might conclude that the apparent difference lies in the difference in molar masses.

Therefore, SUGAR.

Sugar is correct ans. b'coz it has -OH group which has a partial negetive charge
When this partial -ve charge comes in contact with partial +ve bar of oxygen of H2O forms a new bond & also forms a shield arond it.
This shield protect it 4rm rest of sugar molecule & helps it to avoid becoming again sugar crystal.

In case of NaCl only few particles disolves & again regain there orignal str'.

Salt is an ionic compound -- that is, the sodium and chloride parts are charged particles, Na+ and Cl-. The.
Bonds that join these ions in the crystal are very strong. That's why salt is so very hard to melt. Sugar.
Melts easily because the bonds that hold those molecules together in the solid (crystalline state) are much.
Weaker.

Sugar having formula (C12H22O11), it consist of covalent bond between C-H,

Salt having formula (NaCl) , it consist of Ionic bond between Na-Cl,

For C-H Bond energy is 413 KJ/Mol.

For Na-Cl Bond energy is 756 KJ/Mol.

From this above values of bond energies, sugar is Most soluble than salt.

No, I am not satisfied with the Sugar.

I think the right answer be Common Salt.

Because I Tried it.

I take two beakers with 500g of water. And try to dissolve salt and sugar in both different.

Beakers I Stir it firmly and I noticed that sugar settle downs but salt is disappeared!