A strong acid is one that completely ionizes in solution to produce hydrogen ions and weak acid is one that shows less than 100% ionization in solution.
The strength of an acid isn't the same thing as its concentration. A strong acid can be either concentrated or dilute, but a concentrated strong acid will have more hydrogen ions than a weak acid of the same volume and concentration.
The strong acids are:
hydrochloric acid,
...
A strong acid is one that completely ionizes in solution to produce hydrogen ions and weak acid is one that shows less than 100% ionization in solution.
The strength of an acid isn't the same thing as its concentration. A strong acid can be either concentrated or dilute, but a concentrated strong acid will have more hydrogen ions than a weak acid of the same volume and concentration.
The strong acids are:
hydrochloric acid,
hydroiodic acid,
hydrobromic acid,
nitric acid,
sulfuric acid,
perchloric acid,
Some common weak acids are:
acetic acid,
carbonic acid,
phosphoric acid,
nitrous acid,
When these weak acids dissolve in water most of the acid molecules stay intact and only a small percentage ionize.
When an acid ionizes in water it produces the hydronium ion, , which is also represented as the hydrogen ion
. Here's an example of ionization of HCl shown both ways:
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