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Mass–action Ratio
The mass–action ratio, often denoted by \Gamma, is the ratio of the product concentrations, p, to reactant concentrations, s. The concentrations may or may not be at equilibrium. \Gamma = \frac This assumes that the stoichiometric amounts are all unity. If not, then each concentration must be raised to the power of its corresponding stoichiometric amount. If the product and reactant concentrations are at equilibrium then the mass–action ratio will equal the equilibrium constant. At equilibrium: \Gamma = K_ The ratio of the mass–action ratio to the equilibrium constant is often called the disequilibrium ratio, denoted by the symbol \rho. \rho = \frac and is a useful measure for indicating how far from equilibrium a given reaction is. The ratio is always greater than zero, and at equilibrium, the ratio is one: \rho = 1. When the reaction is out of equilibrium, \rho \neq 1. When \rho < 1, the reaction is out of equilibrium with a forward rate higher than the reverse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stoichiometric Amount
Stoichiometry () is the relationships between the masses of reactants and products before, during, and following chemical reactions. Stoichiometry is based on the law of conservation of mass; the total mass of reactants must equal the total mass of products, so the relationship between reactants and products must form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of the products can be empirically determined, then the amount of the other reactants can also be calculated. This is illustrated in the image here, where the unbalanced equation is: : : However, the current equation is imbalanced. The reactants have 4 hydrogen and 2 oxygen atoms, while the product has 2 hydrogen and 3 oxygen. To balance the hydrogen, a coefficient of 2 is added to the product H2O, and to fix the imbalance of oxygen, it is also added to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
