Relative Strengths of Acids and Bases
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Last updated 8:08 PM on 8/19/22
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16 Terms
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HA
________ must be a weaker acid than H3O+ and, A- must be a STRONGER base than water.
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strength of an acid
The ________ is measured by the extent to which it forms H3O+ in water.
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strength of a base
The ________ is measured by the extent to which it forms hydroxide ions in water.
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Weak acids
________ are only slightly ionized.
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Ka values
________ are related to the strength of the acids.
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HA(aq) + H2O(l) ⇌ H3O+(aq) + A
(aq)
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Acid ionization constant (Ka)
the equilibrium constant for an acid
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Base ionization constant (Kb)
the equilibrium constant for a base
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HA must be a weaker acid than H3O+ and, A
must be a STRONGER base than water
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Kb =
([HB+][OH-])/[B]
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Ka =
([H+][A-])/[HA]
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The larger the Ka,
the stronger the acid
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The smaller the Ka,
the weaker the acid
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The larger the Kb,
the stronger the base
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The smaller the Kb,
the weaker the base
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The stronger the acid,
the WEAKER its conjugate base.
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