In: Chemistry
First, let us state the Le Chatelier principle which deals with changes in an equilibrium:
The statement is as follows:
If any equilibrium is disturbed, that is, change in conditions such as P,T, concentration, partial pressure, etc.., the system will counterbalance such change in order to favour the system's equilbirium.
Then...
the concentration of a REACTANT can always be used in order to favour products as follow:
Increasing reactants, will favour MORE production of the final products, (the counterbalances implies reaction of the raw material into final products)