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Chemical Equilibrium
Chapter 18 Key Terms
9
Chemistry
Not Applicable
03/22/2004

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Term
reversible reaction
Definition
a chemical reaction in which the products can react to re-form the reactants.
Term
chemical equilibrium
Definition
a state of balance in which the rate of a forward reaction equals the rate of its reverse reaction and the concentrations of its products and reactants remain unchanged.
Term
equilibrium constant
Definition
the ratio of the mathematical product of the concentrations of substances formed at equilibrium to the mathematical product of the concentrations of the reacting substances. Each concentration is raised to a power equal to the coefficient of that substance in the chemical equation.
Term
chemical-equilibrium expression
Definition
the equation for the equilibrium constant, k.
Term
common-ion effect
Definition
the phenomenon in which the addition of an ion common to two solutes brings about precipitation or reduced ionization.
Term
acid-ionization constant
Definition
the term ka. the a is supposed to be a subscript of k.
Term
buffered solution
Definition
a solution that can resist changes in ph.
Term
hydrolysis
Definition
a reaction between water molecules and ions of a dissolved salt.
Term
solubility-product constant
Definition
the product of the molar concentrations of ions of a substance in a saturated solution, each raised to the power that is the coefficient of that ion in the chemical equation.
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