Ch 15 – Chemistry Answers – Flashcards

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amphoteric
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exhibiting both acidic and basic properties
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buffer capacity
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a measure of the amount of acid or base that a buffer can absorb without a significant change in pH
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buffer solution
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a solution of a weak acid and its conjugate base that resists drastic changes in pH
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common-ion effect
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the shift in the position of an equilibrium on addition of a substance that provides an ion in common with one of the ions already involved in the equilibrium
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conjugate base
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the species A- formed by the loss of H+ from an acid HA
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equivalence point
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the point in a titration at which stoichiometrically equivalent quantities of reactants have been mixed together
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formation constant (Kf)
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the equilibrium constant for formation of a complex ion
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Henderson-Hasselbalch equation
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an equation relating the pH of a solution to the pKa of the weak acid; pH=pKa + log([base]/[acid])
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ion product (IP)
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a number defined in the same way as Ksp, except that the concentrations in the expression for IP are not necessarily equilibrium values
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pH titration curve
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a plot of pH of a solution as a function of the volume of added base or acid
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pKa
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qualitative analysis
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a procedure for identifying the ions present in an unknown solution
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solubility product constant (Ksp)
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the equilibrium constant for a dissolution reaction
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stability constant
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weak acid
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an acid that dissociates incompletely in water and is a weak electrolyte
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