Most of us have heard of acids and bases. Alkali is another name for a base. There are numerous definitions for a base but a common one is that they contain the OH^- when in solution. They are used in chemistry labs, in commercial practice to make soaps, neutralize acids, etc. Here is a web site where you can read more about an alkali.
http://en.wikipedia.org/wiki/Alkali
what is an alkali and where do we use them
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alkali is a metal not encluding hydrogen and it is very reactive metals
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