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Question
Harry Potter wanted to make a supersaturated solution of dragonwood in his potions class. Select from the following which would allow him to make one.
Note: Cauldron is just a vessel.
Harry Potter wanted to make a supersaturated solution of dragonwood in his potions class. Select from the following which would allow him to make one.
Note: Cauldron is just a vessel.
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Solution
The correct option is C Increase the pressure of the gas.
You know supersaturation happens because conditions of the solution can be changed quicker than the solute can precipitate or crystallize out.
Keeping this in mind,
The condition of supersaturation does not necessarily have to be reached through the manipulation of heat. The ideal gas law
PV = nRT
suggests that pressure and volume can also be changed to force a system into a supersaturated state. If the volume of solvent is decreased, the concentration of the solute can be above the saturation point and thus create a supersaturated solution. The decrease in volume is most commonly generated through evaporation. Similarly, an increase in pressure can drive a solution to a supersaturated state
You know supersaturation happens because conditions of the solution can be changed quicker than the solute can precipitate or crystallize out.
Keeping this in mind,
The condition of supersaturation does not necessarily have to be reached through the manipulation of heat. The ideal gas law
PV = nRT
suggests that pressure and volume can also be changed to force a system into a supersaturated state. If the volume of solvent is decreased, the concentration of the solute can be above the saturation point and thus create a supersaturated solution. The decrease in volume is most commonly generated through evaporation. Similarly, an increase in pressure can drive a solution to a supersaturated state
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