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AdiChemistry Home The le Chatelier's principle can be stated as: When external stress is applied on a system at dynamic equilibrium, the system shifts the position of equilibrium so as to nullify the effect of stress. Stress can be applied on chemical systems by changing the concentration or pressure or temperature.

This is very helpful. It gives examples and explains how it works.

I definitely think this is a helpful explanation of Raoult's law- especially for those that are struggling to understand the three types of situations Raoult's law covers: nonvolatile non-ionic solute in a solvent, nonvolatile ionic solute in a solvent, and a mixture of volatile solvents.

Here is a sample problem similar to #24 on the practice exam. Hope his explanation is useful to you all.