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9 Cards in this Set
- Front
- Back
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Chemical equilibrium
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The state reached by a reaction mixture when the rates of forward and reverse reaction have become equal.
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Equilibrium-constant expression
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An expression obtained by multiplying the concentrations of products, dividing by the concentrations of reactant, and raising each concentration term to a power equal to the coefficient in the chemical equation.
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Equilibrium constant Kc
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The value obtained for the equilibrium-constant expression when equilibrium concentrations are substituted.
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Law of mass action
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A relation that states that the values of the equilibrium-constant expression Kc are constant for a particular reaction at a given temperature, whatever equilibrium concentrations are substituted.
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Equilibrium constant Kp
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Equilibrium constant for a gaseous reaction in terms of partial pressures.
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Homogeneous equilibrium
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An equilibrium that involves reactants and products in a single phase.
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Heterogeneous equilibrium
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Equilibrium involving reactants and products in more than one phase.
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Reaction Quotient
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An expression that has the same form as the equilibrium-constant expression but whose concentration values are not necessarily those at equilibrium.
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Le Châtelier’s principle
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When a system in chemical equilibrium is disturbed by a change of temperature, pressure, or a concentration, the system shifts in equilibrium composition in a way that tends to counteract this change of variable.
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