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A strong acid differs from a weak acid only in terms of the extent of ionization. The extent of ionization measures the fraction of molecules that ionize.

a. A strong acid is dissociates or ionizes 100% to form H3O1+ and an anion. This means if there were 100 HI molecules at the begining of the solution process, then at equilibrium there would be "zero" HI molecules and 100 H3O1+ and 100 I1- anions.

HI(aq) + H2O(l) ---> H3O1+(aq) + I1-(aq)

b. A strong base is a substance that is essentially completely protonated, they accept protons more readily than other molecules. The hydroxide ion is considered to be a strong base.

c. A weak acid is only partially ionized so that the majority of acid molecules or ions are still intact. This means when the percent ionization is 4%, if there were 100 HF molecules at the begining of the solution process, then at equilibrium there would be "96" HF molecules and 4 H3O1+ and 4 F1- anions.

d. A weak base is only partially protonated so that the majority of base molecules or ions are intact.

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