We often find that there is a limit to the quantity of solute which will dissolve in a given quantity of solvent. This is especially true when solids dissolve in liquids. For example, if 36 g KCl crystals is shaken with 100 g H2O at 25°C only 35.5 g of the solid dissolves. If we raise the temperature somewhat, all the KCl will dissolve, but on cooling to 25°C again, the extra 0.5 g KC1 will precipitate, leaving exactly 35.5 g of the salt dissolved. We describe this phenomenon by saying that at 25°C the solubility of KCl in H2O is 35.5 g KC1 per 100 g H2O. A solution of this composition is also described as a saturated solution since it can accommodate no more KCl. Under some circumstances it is possible to prepare a solution which behaves anomalously and contains more solute than a saturated solution. Such a solution is said to be supersaturated. A good example of supersaturation is provided by Na2S2O3, sodium thiosulfate, whose solubility at 25°C is 50 g Na2S2O3 per 100 g H2O. If 70 g Na2S2O3 crystals is dissolved in 100 g hot H2O and the solution cooled to room temperature, the extra 20 g Na2S2O3 usually does not precipitate. The resulting solution is supersaturated; consequently it is also unstable. It can be "seeded" by adding a crystal of Na2S2O3, whereupon the excess salt suddenly crystallizes and heat is given off. After the crystals have settled and the temperature has returned to 25°C, the solution above the crystals is a saturated solution-it contains 50 g Na2S2O3. Another example of crystallizing salt out of a supersaturated solution can be seen in the following video. In this case, a supersaturated solution of sodium acetate is poured over a crystals of sodium acetate. These crystals provide the lattice structure "seed" which causes the sodium acetate ions in solution to crystallize out. The video begins with a few crystals of sodium acetate placed on the lab bench. A supersaturated solution of sodium acetate is poured over the crystals providing a seed or crystallization. The salt begins to crystallize, forming a large sodium acetate structure from the precipitation of the ions out of solution. When the sodium acetate crystallizes, the oppositely charged ions are brought closer together by the crystal structure. Since formation of a crystal lattice lowers potential energy by placing like charges close together, the system releases the excess energy in the crystallization process. Thus, the structure ends up being warm to the touch from this excess energy.
This may cause the preciptation of crystals of the substance in solution.
the solute will begin to form crystals
the solute will begin to form crystals
It starts the crystalisation process
The solubility of sodium chloride is 360,9 g/L at 20 0C; after this concentration the solution is supersaturated.
If it is saturated with a solid solute, you would expect some of the solid to precipitate out - as long as the solid could find a surface to nucleate on. If it is saturated with a gas, you would expect more gas to dissolve into it as long as it was still in contact with the saturating gas in the gas phase.
A solution is obtained.
You don't get a counterstain.
This depends on the pH value of this solution !
The solute will eventually fall out of a supersaturated solution
The seed will be destroyed.
The solute will eventually fall out of a supersaturated solution
The solubility of sodium chloride is 360,9 g/L at 20 0C; after this concentration the solution is supersaturated.
It will dissolve
it explodes
a solution occurs when all the drink particles beak apart from the crystal, and mix completely with the water particles
It can happen. Then there is no solution!It can happen. Then there is no solution!It can happen. Then there is no solution!It can happen. Then there is no solution!
I know this because our class just did a lab and I wrote a 15 page paper on this. Essentially, when you make a supersaturated solution, you heat a saturated solution up until it is realls UNsaturated, and then you add more solute to bring the heated solution CLOSE, but not TO, saturation. Then you cool the solution down gently, without agitating it, and if you're lucky, none of the solute will precipitate, making the solution, of course, supersaturated. Now, the balance between these particles is really frail. So if you add more solute to the supersat. solution, all of the originally dissolved solid(only the solid that you put in the hot solution) will crystallize. Basically, one moment there will be a tiny crystal in a test tube full of liquid, and the next moment the test tube will be half full with crystals. sooo....yeah
Crystal Defenders happened in 2008.
Crystal Caves happened in 1991.
Crystal Warriors happened in 1991.