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Chemical Equilibrium





 
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More Lessons for High School Chemistry

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A series of free High School Chemistry Video Lessons.

In this lesson, we will learn

  • The definition of chemical equilibrium
  • Homogeneous and Heterogeneous Equilibrium
  • Le Chatelier's Principle


Chemical Equilibrium Definition
The definition of chemical equilibrium is the point at which the concentrations of reactants and products do not change with time. It appears as though the reaction has stopped but in fact the rates of the forward and reverse reactions are equal so reactants and products are being created at the same rate.
A definition of chemical equilibrium.
Homogeneous and Heterogeneous Equilibrium
Homogeneous and heterogeneous equilibrium is a system of chemical equilibrium which depend upon the states of matter of the substances involved. Homogeneous equilibrium involves substances in the same state. Heterogeneous equilibrium involves substances in different states. The position of heterogeneous equilibrium does not depend on the amount of pure solid and liquid present.
Understanding the difference between homogeneous and heterogeneous equilibrium.



Le Chatelier's Principle
Le Chatelier's principle states that when a change in concentration, pressure, or temperature is applied to a system at equilibrium, the position of the equilibrium shifts in direction that tends to reduce the effect of that change. For instance if an amount of reactant of the product is added, the system shifts towards the removed component.
How Le Chatlier's principle governs chemical equilibrium.
Le Chatelier's Principle regarding the "stressing" of reactions in equilibrium


 

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