If an acid completely ionizes in water, it would not be called a weak acid, right?
A weak acid can completely ionize at a high pH. Remember: H3O+ concentration is very low at a high pH. This very low H3O+ concentration would not prohibit a weak acid from (almost) complete ionization, which is determined by Ka = [H3O+]*[A-] /[HA]
When an acid got completely ionized, it lost its buffering capability, since a buffer solution must have sufficient [A-] and [HA] concentrations, such that the system may be able to conpensate by either reducing or increasing the concentration of [A-] at the cost of [HA].
2007-10-04 12:13:57
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answer #1
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answered by Hahaha 7
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