27th October 2011 - 09:37 AM
Chemical equilibrium is the state in which the concentrations of the reactants and products have not yet changed with time.
28th October 2011 - 04:38 AM
It occurs only in reversible reactions, and not in irreversible reactions.
29th October 2011 - 06:08 AM
Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction.
31st October 2011 - 03:13 AM
The reaction rates of the forward and reverse reactions are generally not zero but, being equal, there are no net changes in the concentrations of the reactant and product.
31st October 2011 - 12:54 PM
This process is called dynamic equilibrium.
1st November 2011 - 03:04 AM
The concept of chemical equilibrium was developed after Berthollet (1803) found that some chemical reactions are reversible.
2nd November 2011 - 03:13 AM
For any reaction mixture to exist at equilibrium, the rates of the forward and backward (reverse) reactions are equal.
3rd November 2011 - 06:54 AM
In the following chemical equation with arrows pointing both ways to indicate equilibrium, A and B are reactant chemical species, S and T are product species, and α, β, σ, and τ are the stoichiometric coefficients of the respective reactants and products:
\alpha A + \beta B \rightleftharpoons \sigma S + \tau T