Chemistry: Acids and Bases
English

An acid is a solution that has an excess of hydrogen(H+) ions. A base is a solution that has an excess of hydroxide(OH-) ions. Another word for base is alkali. The strength of an acid or base can be either strong or weak.

* An acid that has a very low pH (0-4) are known as Strong acids.
* A base that has a very high pH (10-14) are known as Strong bases.
* An acid that only partially ionizes in an aqueous solution are known as Weak acids.
* A base that only partially ionizes in an aqueous solution are known as Weak bases.

Chemistry: Acids and Bases

The table shows about the strength of Acids and Bases and their formula.

Acid/baseTypeFormula
Acetic acidWeak acidCH3COOH
Formic acidWeak acidHCOOH
Hydrofluoric acidWeak acidHF
Hydrogen sulfideWeak acidH2S
Nitric acidStrong acidHNO3
Hydrochloric acidStrong acidHCl
Hydroiodic acid Strong acidHl
Perchloric acid Strong acidHClO4
AmmoniaWeak base NH3
pyridineWeak baseC5H5N
Ammonium hydroxideWeak baseNH4OH
Lithium hydroxideStrong BaseLiOH
Potassium hydroxideStrong baseKOH
Calcium hydroxide Strong BaseCa(OH)2
Barium hydroxideStrong BaseBa(OH)2
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