This page was constructed from content via the following contributor s and edited topically or extensively by the LibreTexts development team to meet platform style, presentation, and quality:. Learning Objectives Explain what the term "colligative" means, and list the colligative properties.
Indicate what happens to the boiling point and the freezing point of a solvent when a solute is added to it. Calculate boiling point elevations and freezing point depressions for a solution. Freezing Point Depression The effect of adding a solute to a solvent has the opposite effect on the freezing point of a solution as it does on the boiling point.
Comparing the Freezing and Boiling Point of Solutions Recall that covalent and ionic compounds do not dissolve in the same way. To compare the boiling or freezing points of solutions, follow these general steps: Label each solute as ionic or covalent.
If the solute is ionic, determine the number of ions in the formula. Be careful to look for polyatomic ions. This will give you the total concentration of particles dissolved. Compare these values. The higher total concentration will result in a higher boiling point and a lower freezing point. Summary Colligative properties are properties that are due only to the number of particles in solution, and are not related to the chemical properties of the solute. Boiling points of solutions are higher than the boiling points of the pure solvents.
Freezing points of solutions are lower than the freezing points of the pure solvents. Ionic compounds split into ions when they dissolve, forming more particles. Covalent compounds stay as complete molecules when they dissolve. Vocabulary Colligative property - A property that is due only to the number of particles in solution, and not the type of the solute. Bakelite is manufactured by using a mixture of Polymers. An example for a face centred cubic lattice is The Solid State.
Coordination number of caesium in caesium chloride is The Solid State. Which one of the following is not ferromagnetic? The Solid State. Equivalent mass of the acid is Some Basic Concepts of Chemistry. Oxygen molecule is Chemical Bonding and Molecular Structure. A process is spontaneous at a given temperature if Thermodynamics. For most liquids, applying pressure raises the temperature at which the liquid freezes to solid.
Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Physics Which of the following solution will have the lowest freezing point? Ben Davis March 17, Which of the following solution will have the lowest freezing point? Which solution has the lowest freezing point kl? Scientists have found liquid water as cold as degrees F in clouds and even cooled water down to degrees F in the lab. Why does water freeze? Freezing happens when the molecules of a liquid get so cold that they slow down enough to hook onto each other, forming a solid crystal.
For pure water, this happens at 32 degrees Fahrenheit, and unlike most other solids, ice expands and is actually less dense than water. How fast does water freeze at 0? Water freezes when it reaches 32 degrees Fahrenheit 0 degree Celsius , but the time it takes to do so depends on several factors that may be different in your freezer than in your neighbor's.
First, the size of the ice cubes matters. Can moving water freeze? For flowing water to freeze, the temperature would have to be exceptionally cold. In a way, glaciers are just like frozen rivers. Then, a thin layer at the surface starts to freeze while floating on the denser water below. By contrast, in moving water, the entire volume has to cool to 0C before freezing starts.
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