CHEM 105bL Lecture Notes - Lecture 7: Equilibrium Constant, Reversible Reaction, Dynamic Equilibrium
Document Summary
Reversible reactions: proceed in forward and reverse directions. i. ii. iii. Equilibrium: the condition in which the rate of the forward reaction equals the rate of the reverse reaction. Dynamic equilibrium: in a reversible reaction, as products accumulate, they begin to form reactants by a reverse reaction. Dynamic equilibrium is when the concentrations of reactants and products remain constant. iv. v. A reversible reaction in dynamic equilibrium rarely has 50% reactants and 50% products. The rate of the forward and reverse reactions are equal, but rarely are the moles of reactant and product equal too: equilibrium constant, k. Equilibrium constant, k: the ration of reactant to product concentrations. i. ii. iii. Liquids or solids that form gases can be considered irreversible. For stoichiometry, assume reactions with k values outside this range are irreversible: i. ii. K>>1: the forward reaction proceeds to completion: manipulating k: aa+bb cc +dd. If the reaction is reversed: cc +dd aa+bb.
