Chemical Equilibrium

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Section 1

Question Answer
Chemical equilibriumoccurs when opposing reactions proceed at equal rates
equilibrium statea mixture of reactants and products whose concentrations no longer change with time.
At equilibrium,the concentrations of reactants and products no longer change withtime.
For equilibrium to occurneither reactants nor products can escape from the system
At equilibriuma particular ratio ofconcentration terms equals a constant
homogeneous equilibria.substances that are all in the same phase,usually gas or liquid.
heterogeneous equilibriathe substances in equilibrium are in different phases
Thereaction quotient,Q,s a number obtained by substituting reactant andproduct con- centrations or partial pressures at any point during a reaction into an equilibrium-constant expression.

Section 2