Tips and Tricks on Solutions


Try to visual two molecules colliding into each other to grasp the concept of collisions. Visualizing is the key to understanding this topic, rather than plain memorization.


The number of molecules escaping the surface of a liquid surface is proportional to the surface area of the liquid. And when the liquid contains a solute, some of the solvent particles are replaced by the solute particles on the liquid surface, thereby decreasing the surface area for the solvent molecule to escape.
Rate of Evaporation and condensation both lowers due to the less available area on the surface of liquid for escape. Addition of a type of solute decrease/increase the rate of evaporation / condensation of the given solution.

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