|Concentrated vs. Dilute; Strong vs.
|These terms are often the most misused in chemistry.
and dilute refer to the concentration of an acidic or basic
in a solvent. eg. 16 M HCl is more concentrated than a 0.5 M
of the same acid.
|Strong and weak refer to the ability of an acid or base to
A strong acid will dissociate completely in water to form hydronium
i.e. 100% of it will form H3O+. A
acid or base will only dissociate to a certain percentage. Often a very
small percentage only.
|Strong and Weak Bases
|NH3(aq) is a poor conductor of electricity when
with NaOH(aq). This means that the degree of dissociation of NH3
in water is relatively small when compared with that of the NaOH.
A base which is only slightly dissociated in aqueous solution is called
a weak base; one which is highly dissociated is called a strong
All the strong bases happen to be inorganic, that is, the NaOH, KOH,
group. Even Ca(OH)2 and Ba(OH)2 are considered to
be strong bases. All of the rest are too insoluble to provide a
[OH-] in water. The double arrow convention should be used when
with a weak base. A single arrow is to be used when showing the
of a strong base since for all practical purposes, dissociation is 100%
complete. i.e., a water solution made from NaOH(s) will have no
of NaOH in it. The NaOH will be completely ionized into Na+