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<center>Basic Chemical Equilibrium</center> 
 
 
 
- Chemical equilibrium is the location in a reaction that the concentrations of all reactants and products stay constant over a long period of time. Chemical equilibrium occurs in any reaction that is done in a closed system.
 
 
-Equilirium is not when a reaction has stopped or become complete. It is a balance between the foreward reaction and the backward reaction. An example of this is when sugar is dissolved in water. Although not a chemical reaction, the equilibriumidea still applies. The solid sugar is dissolving at the same rate as dissolved sugar is re-forming. This is basic equilibrium.

Equation<center> [C]c [D}d</center> 
<center>K= _________</center> 
<center> [A]a [b]b</center> 
 
Steps to solve an equilibrium equation. 
 
1- Change the A,B,C,D in the equation to the chemicals in your reaction. Products go on top and reactants go on the bottem. 
 
2- Plug in the given molarities for the chemicals. 
 
3- Solve for K, which is your equilibrium constant. 
 
Note- The equation can also be done when you are given a K and a molarity asked to find the concentrations of the other chemicals. The same process of pulgging in and solving for the unknown applies.

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