Is reaction quotient and ion activity product the same thing?
For a reaction such as 2 A + B C + 2D the reaction quotient (Q) is written: Q = ªC ªD² / ªA² ªB The reaction quotient contains the activities (C,D) of the products in the numerator and the activity of each product is raised to a power corresponding to its stoichiometric constant – thus the activity of product C is raised to the power of “1” and the activity of the product D is raised to the power of “2”. The reaction quotient also contains the activities (A,B) of the reactants in the denominator with the activity of each reactant raised to a power corresponding to its stoichiometric constant – thus the activity of reactant A is raised to the power of “2” and the activity of reactant B is raised to the power of “1”.
